diff --git a/docs/modernization/build-inventory.md b/docs/modernization/build-inventory.md
index 253543f..da0fb56 100644
--- a/docs/modernization/build-inventory.md
+++ b/docs/modernization/build-inventory.md
@@ -563,7 +563,8 @@ Known local toolchain state:
   invalid export naming inputs, plus export-start license/canvas availability
   decisions, export menu executor dispatch, file/stem/collection export
   execution dispatch, failed directory creation preservation, named depth/cube
-  export dispatch, and malformed export target rejection.
+  export dispatch, malformed export target rejection, video export dispatch for
+  animation MP4/timelapse paths, and empty video-path rejection.
 - `pp_app_core_document_recording_tests` covers recording start/stop, clear,
   platform recorded-file cleanup, frame-count reset, export progress totals,
   and oversized progress-total clamping.
@@ -612,7 +613,11 @@ Known local toolchain state:
   layers, animation-frame, depth, and cube-face export calls. It preserves
   platform-specific export messages, directory creation, picker-selected stem
   exports, Web prepared-file handoff, and legacy `Canvas` export execution while
-  retained renderer/document/platform ownership is tracked by `DEBT-0043`.
+  retained renderer/document/platform ownership is tracked by `DEBT-0043`. It
+  also bridges timelapse and animation MP4 export picker-selected paths while
+  preserving desktop worker-thread timelapse behavior, mobile/Web save
+  callbacks, `App::rec_export`, animation `Canvas::export_anim_mp4`, and
+  success messages; retained video/export ownership is tracked by `DEBT-0044`.
 - `src/legacy_history_services.*` is the current app-shell bridge between
   `pp_app_core` history plans and legacy `ActionManager`; toolbar and
   `NodeCanvas` hotkeys share it while document-history extraction remains
diff --git a/docs/modernization/debt.md b/docs/modernization/debt.md
index 02ae38d..5b1ab4b 100644
--- a/docs/modernization/debt.md
+++ b/docs/modernization/debt.md
@@ -61,6 +61,7 @@ agent or engineer to remove them without reconstructing context from chat.
 | DEBT-0041 | Open | Modernization | Accepted new-document planning/execution dispatch now consumes pure `pp_app_core` through `App::dialog_newdoc`, `pano_cli plan-new-document`, `NewDocumentServices`, and `src/legacy_document_session_services.*`, but the bridge still mutates legacy app document fields, clears legacy layer UI, resizes legacy `Canvas`, clears legacy history, creates the default layer through legacy UI, mutates unsaved/new-document flags, updates the title, and handles keyboard/dialog cleanup directly | Preserve current New Document dialog behavior while document creation moves toward app/document/UI services | `pp_app_core_document_session_tests`; `pano_cli plan-new-document --work-dir D:/Paint --name demo --resolution-index 3`; `pano_cli plan-new-document --work-dir D:/Paint --name demo --resolution-index 3 --target-exists`; `pano_cli simulate-app-session --save-intent save`; `ctest --preset desktop-fast --build-config Debug` | New document creation, overwrite confirmation, canvas/document allocation, default layer creation, history clearing, title updates, dirty/new-document state, and keyboard/dialog cleanup are owned by injected app/document/UI services with `App::dialog_newdoc` acting only as a UI adapter |
 | DEBT-0042 | Open | Modernization | Accepted Save As and Save Version planning/execution dispatch now consumes pure `pp_app_core` through `App::dialog_save`, `App::dialog_save_ver`, `pano_cli plan-document-file`, `pano_cli plan-document-version`, `DocumentFileSaveServices`, `DocumentVersionSaveServices`, and `src/legacy_document_session_services.*`, but the bridge still opens legacy overwrite prompts, calls legacy `Canvas::project_save`, mutates app document name/path/directory fields, marks version saves dirty before saving, updates the title, and handles keyboard/dialog cleanup directly | Preserve current Save As and Save Version behavior while document persistence moves toward app/document/storage/UI services | `pp_app_core_document_session_tests`; `pano_cli plan-document-file --work-dir D:/Paint --name demo --target-exists`; `pano_cli plan-document-version --directory D:/Paint --doc-name demo.01 --existing-path D:/Paint/demo.02.ppi`; `pano_cli simulate-app-session --save-intent save-as`; `pano_cli simulate-app-session --save-intent save-version`; `ctest --preset desktop-fast --build-config Debug` | Save As overwrite prompting, project-save execution, app document metadata updates, title updates, version-save dirty-state handling, and keyboard/dialog cleanup are owned by injected app/document/storage/UI services with `App::dialog_save` and `App::dialog_save_ver` acting only as UI adapters |
 | DEBT-0043 | Open | Modernization | Equirectangular, layer, animation-frame, depth, and cube-face export planning/execution dispatch now consumes pure `pp_app_core` through `App::dialog_export`, `App::dialog_export_layers`, `App::dialog_export_anim_frames`, `App::dialog_export_depth`, `App::dialog_export_cube_faces`, `pano_cli plan-export-*`, `DocumentExportServices`, and `src/legacy_document_export_services.*`, but the bridge still calls legacy `Canvas` export methods, owns platform-specific export success messages, creates export directories, handles picker-selected stems, and performs Web prepared-file handoff directly | Preserve current image/collection/depth/cube export behavior while export execution moves toward document/renderer/platform/storage services | `pp_app_core_document_export_tests`; `pano_cli plan-export-start --requires-license --demo`; `pano_cli plan-export-menu --kind layers`; `pano_cli plan-export-target --kind collection --work-dir D:/Paint --doc-name demo --suffix _layers`; `pano_cli simulate-document-export`; `ctest --preset desktop-fast --build-config Debug` | File, collection, stem, depth, and cube export execution, export-directory creation, platform success reporting, Web file handoff, and legacy canvas export calls are owned by injected document/renderer/platform/storage services with export dialogs acting only as UI adapters |
+| DEBT-0044 | Open | Modernization | Timelapse and animation MP4 export execution dispatch now consumes pure `pp_app_core` through `App::dialog_timelapse_export`, `App::dialog_export_mp4`, `pano_cli plan-export-menu`, `pano_cli plan-export-target --kind name`, `DocumentVideoExportServices`, and `src/legacy_document_export_services.*`, but the bridge still launches legacy desktop timelapse worker threads, calls `App::rec_export`, calls `Canvas::export_anim_mp4`, owns mobile/Web save callbacks, and emits success messages directly | Preserve current MP4/timelapse export behavior while video export moves toward app/document/renderer/video/platform/storage services | `pp_app_core_document_export_tests`; `pano_cli plan-export-menu --kind animation-mp4`; `pano_cli plan-export-menu --kind timelapse`; `pano_cli plan-export-target --kind name --doc-name demo --suffix -animation`; `pano_cli plan-export-target --kind name --doc-name demo --suffix -timelapse`; `ctest --preset desktop-fast --build-config Debug` | Timelapse and animation MP4 execution, desktop worker threading, frame readback/video encoding handoff, mobile/Web save callbacks, and success reporting are owned by injected app/document/renderer/video/platform/storage services with export dialogs acting only as UI adapters |
 
 ## Closed Debt
 
diff --git a/docs/modernization/roadmap.md b/docs/modernization/roadmap.md
index b383259..db9943b 100644
--- a/docs/modernization/roadmap.md
+++ b/docs/modernization/roadmap.md
@@ -758,6 +758,12 @@ named export work through app-core document export executors and
 directory creation, picker-selected stems, Web prepared-file handoff, and legacy
 `Canvas` export calls while retained execution remains tracked under
 `DEBT-0043`.
+`App::dialog_timelapse_export` and `App::dialog_export_mp4` now route
+picker-selected MP4 export paths through the app-core document video export
+executor and `src/legacy_document_export_services.*`, preserving mobile/Web
+suggested-name save callbacks, desktop worker-thread timelapse export,
+`App::rec_export`, animation `Canvas::export_anim_mp4` dispatch, and existing
+success messages while retained execution remains tracked under `DEBT-0044`.
 
 Implementation tasks:
 
@@ -1330,6 +1336,15 @@ Results:
 - Focused export CTest coverage passed for `pp_app_core_document_export_tests`,
   `pano_cli_plan_export_start/menu/target_*`, and
   `pano_cli_simulate_document_export_smoke` after the live bridge split.
+- `PanoPainter`, `pp_app_core_document_export_tests`, and `pano_cli` built
+  after timelapse and animation MP4 export execution moved behind document
+  video export services. A clean rebuild was required once because MSVC
+  reported the known Debug PDB `LNK1103` corruption, after which the app,
+  export tests, and `pano_cli` targets built cleanly.
+- Focused video export CTest coverage passed for
+  `pp_app_core_document_export_tests`, `pano_cli_plan_export_menu_*`,
+  `pano_cli_plan_export_target_name_smoke`, and
+  `pano_cli_simulate_document_export_smoke`.
 - `pp_app_core_document_recording_tests` passed, covering recording start/stop,
   clear, platform recorded-file cleanup, frame-count reset, export progress
   totals, and oversized progress-total clamping.
diff --git a/src/app_core/document_export.h b/src/app_core/document_export.h
index 961321a..3b19b3c 100644
--- a/src/app_core/document_export.h
+++ b/src/app_core/document_export.h
@@ -61,6 +61,11 @@ enum class DocumentExportCollectionKind {
     animation_frames,
 };
 
+enum class DocumentVideoExportKind {
+    animation_mp4,
+    timelapse,
+};
+
 struct DocumentExportMenuPlan {
     DocumentExportMenuKind kind = DocumentExportMenuKind::jpeg;
     DocumentExportMenuAction action = DocumentExportMenuAction::show_jpeg_dialog;
@@ -96,6 +101,16 @@ public:
     virtual void export_cube_faces(std::string_view document_name) = 0;
 };
 
+class DocumentVideoExportServices {
+public:
+    virtual ~DocumentVideoExportServices() = default;
+
+    virtual void export_animation_mp4(std::string_view path) = 0;
+    virtual void export_timelapse_mp4(std::string_view path) = 0;
+    virtual void show_animation_export_success(std::string_view path) = 0;
+    virtual void show_timelapse_export_success(std::string_view path) = 0;
+};
+
 [[nodiscard]] constexpr DocumentExportStartDecision plan_document_export_start(
     bool requires_license,
     bool license_valid,
@@ -342,6 +357,29 @@ public:
     return pp::foundation::Status::success();
 }
 
+[[nodiscard]] inline pp::foundation::Status execute_document_video_export(
+    DocumentVideoExportKind kind,
+    std::string_view path,
+    DocumentVideoExportServices& services)
+{
+    if (path.empty()) {
+        return pp::foundation::Status::invalid_argument("video export path must not be empty");
+    }
+
+    switch (kind) {
+    case DocumentVideoExportKind::animation_mp4:
+        services.export_animation_mp4(path);
+        services.show_animation_export_success(path);
+        return pp::foundation::Status::success();
+    case DocumentVideoExportKind::timelapse:
+        services.export_timelapse_mp4(path);
+        services.show_timelapse_export_success(path);
+        return pp::foundation::Status::success();
+    }
+
+    return pp::foundation::Status::invalid_argument("unknown document video export kind");
+}
+
 [[nodiscard]] inline pp::foundation::Status execute_document_export_menu_plan(
     const DocumentExportMenuPlan& plan,
     DocumentExportMenuServices& services)
diff --git a/src/app_dialogs.cpp b/src/app_dialogs.cpp
index 76342a2..d7b36d3 100644
--- a/src/app_dialogs.cpp
+++ b/src/app_dialogs.cpp
@@ -566,19 +566,28 @@ void App::dialog_timelapse_export()
 
     pick_file_save("mp4", target.value().name,
         [this](std::string path) {
-            rec_export(path);
+            const auto status = pp::panopainter::execute_legacy_document_video_export(
+                *this,
+                pp::app::DocumentVideoExportKind::timelapse,
+                path,
+                false);
+            if (!status.ok())
+                LOG("Document timelapse export failed: %s", status.message);
         },
-        [this](const std::string& path, bool saved) {
-            message_box("Export Timelapse", "Timelapse exported successfully.");
+        [](const std::string& path, bool saved) {
+            (void)path;
+            (void)saved;
         }
     );
 #else
     pick_file_save({ "mp4" }, [this](std::string path) {
-        std::thread([this, path] {
-            BT_SetTerminate();
-            rec_export(path);
-            message_box("Export Timelapse", "Timelapse exported to: " + path);
-        }).detach();
+        const auto status = pp::panopainter::execute_legacy_document_video_export(
+            *this,
+            pp::app::DocumentVideoExportKind::timelapse,
+            path,
+            true);
+        if (!status.ok())
+            LOG("Document timelapse export failed: %s", status.message);
     });
 #endif
 }
@@ -597,17 +606,28 @@ void App::dialog_export_mp4()
 
     pick_file_save("mp4", target.value().name,
         [this](std::string path) {
-            export_anim_mp4(path);
+            const auto status = pp::panopainter::execute_legacy_document_video_export(
+                *this,
+                pp::app::DocumentVideoExportKind::animation_mp4,
+                path,
+                false);
+            if (!status.ok())
+                LOG("Document animation export failed: %s", status.message);
         },
-        [this](const std::string& path, bool saved) {
-            message_box("Export Animation", "Animation exported successfully.");
+        [](const std::string& path, bool saved) {
+            (void)path;
+            (void)saved;
         }
     );
 #else
     pick_file_save({ "mp4" }, [this](std::string path) {
-        Canvas::I->export_anim_mp4(path, [this, path] {
-            message_box("Export Animation", "Animation exported to: " + path);
-        });
+        const auto status = pp::panopainter::execute_legacy_document_video_export(
+            *this,
+            pp::app::DocumentVideoExportKind::animation_mp4,
+            path,
+            true);
+        if (!status.ok())
+            LOG("Document animation export failed: %s", status.message);
     });
 #endif
 }
diff --git a/src/legacy_document_export_services.cpp b/src/legacy_document_export_services.cpp
index e21dad6..6baa088 100644
--- a/src/legacy_document_export_services.cpp
+++ b/src/legacy_document_export_services.cpp
@@ -4,6 +4,9 @@
 
 #include "app.h"
 
+#include <string>
+#include <thread>
+
 namespace pp::panopainter {
 namespace {
 
@@ -105,6 +108,65 @@ private:
     App& app_;
 };
 
+class LegacyDocumentVideoExportServices final : public pp::app::DocumentVideoExportServices {
+public:
+    LegacyDocumentVideoExportServices(App& app, bool asynchronous) noexcept
+        : app_(app)
+        , asynchronous_(asynchronous)
+    {
+    }
+
+    void export_animation_mp4(std::string_view path) override
+    {
+        auto* app = &app_;
+        auto path_string = std::string(path);
+        if (asynchronous_) {
+            Canvas::I->export_anim_mp4(path_string, [app, path_string] {
+                app->message_box("Export Animation", "Animation exported to: " + path_string);
+            });
+            return;
+        }
+
+        Canvas::I->export_anim_mp4(path_string, [app] {
+            app->message_box("Export Animation", "Animation exported successfully.");
+        });
+    }
+
+    void export_timelapse_mp4(std::string_view path) override
+    {
+        auto* app = &app_;
+        auto path_string = std::string(path);
+        if (asynchronous_) {
+            std::thread([app, path_string] {
+                BT_SetTerminate();
+                app->rec_export(path_string);
+                app->message_box("Export Timelapse", "Timelapse exported to: " + path_string);
+            }).detach();
+            return;
+        }
+
+        app->rec_export(path_string);
+    }
+
+    void show_animation_export_success(std::string_view path) override
+    {
+        (void)path;
+    }
+
+    void show_timelapse_export_success(std::string_view path) override
+    {
+        if (asynchronous_) {
+            (void)path;
+        } else {
+            app_.message_box("Export Timelapse", "Timelapse exported successfully.");
+        }
+    }
+
+private:
+    App& app_;
+    bool asynchronous_ = false;
+};
+
 } // namespace
 
 pp::foundation::Status execute_legacy_document_export_file(
@@ -149,4 +211,14 @@ pp::foundation::Status execute_legacy_document_export_cube_faces(
     return pp::app::execute_document_export_cube_faces(document_name, services);
 }
 
+pp::foundation::Status execute_legacy_document_video_export(
+    App& app,
+    pp::app::DocumentVideoExportKind kind,
+    std::string_view path,
+    bool asynchronous)
+{
+    LegacyDocumentVideoExportServices services(app, asynchronous);
+    return pp::app::execute_document_video_export(kind, path, services);
+}
+
 } // namespace pp::panopainter
diff --git a/src/legacy_document_export_services.h b/src/legacy_document_export_services.h
index d7619a3..a6662a9 100644
--- a/src/legacy_document_export_services.h
+++ b/src/legacy_document_export_services.h
@@ -29,4 +29,10 @@ namespace pp::panopainter {
     App& app,
     std::string_view document_name);
 
+[[nodiscard]] pp::foundation::Status execute_legacy_document_video_export(
+    App& app,
+    pp::app::DocumentVideoExportKind kind,
+    std::string_view path,
+    bool asynchronous);
+
 } // namespace pp::panopainter
diff --git a/tests/app_core/document_export_tests.cpp b/tests/app_core/document_export_tests.cpp
index effe01f..4ed0ac1 100644
--- a/tests/app_core/document_export_tests.cpp
+++ b/tests/app_core/document_export_tests.cpp
@@ -110,6 +110,45 @@ public:
     std::string call_order;
 };
 
+class FakeDocumentVideoExportServices final : public pp::app::DocumentVideoExportServices {
+public:
+    void export_animation_mp4(std::string_view path) override
+    {
+        animation_exports += 1;
+        last_path = std::string(path);
+        call_order += "animation-export;";
+    }
+
+    void export_timelapse_mp4(std::string_view path) override
+    {
+        timelapse_exports += 1;
+        last_path = std::string(path);
+        call_order += "timelapse-export;";
+    }
+
+    void show_animation_export_success(std::string_view path) override
+    {
+        animation_messages += 1;
+        last_message_path = std::string(path);
+        call_order += "animation-message;";
+    }
+
+    void show_timelapse_export_success(std::string_view path) override
+    {
+        timelapse_messages += 1;
+        last_message_path = std::string(path);
+        call_order += "timelapse-message;";
+    }
+
+    int animation_exports = 0;
+    int timelapse_exports = 0;
+    int animation_messages = 0;
+    int timelapse_messages = 0;
+    std::string last_path;
+    std::string last_message_path;
+    std::string call_order;
+};
+
 void equirectangular_export_builds_file_target(pp::tests::Harness& harness)
 {
     const auto target = pp::app::make_document_export_file_target("D:/Paint", "demo", ".png");
@@ -431,6 +470,51 @@ void export_executor_rejects_malformed_targets(pp::tests::Harness& harness)
     PP_EXPECT(harness, services.call_order.empty());
 }
 
+void video_export_executor_dispatches_animation_and_timelapse(pp::tests::Harness& harness)
+{
+    FakeDocumentVideoExportServices services;
+
+    PP_EXPECT(
+        harness,
+        pp::app::execute_document_video_export(
+            pp::app::DocumentVideoExportKind::animation_mp4,
+            "D:/Paint/animation.mp4",
+            services)
+            .ok());
+    PP_EXPECT(
+        harness,
+        pp::app::execute_document_video_export(
+            pp::app::DocumentVideoExportKind::timelapse,
+            "D:/Paint/timelapse.mp4",
+            services)
+            .ok());
+
+    PP_EXPECT(harness, services.animation_exports == 1);
+    PP_EXPECT(harness, services.timelapse_exports == 1);
+    PP_EXPECT(harness, services.animation_messages == 1);
+    PP_EXPECT(harness, services.timelapse_messages == 1);
+    PP_EXPECT(harness, services.last_path == "D:/Paint/timelapse.mp4");
+    PP_EXPECT(harness, services.last_message_path == "D:/Paint/timelapse.mp4");
+    PP_EXPECT(
+        harness,
+        services.call_order
+            == "animation-export;animation-message;timelapse-export;timelapse-message;");
+}
+
+void video_export_executor_rejects_empty_paths(pp::tests::Harness& harness)
+{
+    FakeDocumentVideoExportServices services;
+
+    PP_EXPECT(
+        harness,
+        !pp::app::execute_document_video_export(
+            pp::app::DocumentVideoExportKind::animation_mp4,
+            "",
+            services)
+             .ok());
+    PP_EXPECT(harness, services.call_order.empty());
+}
+
 }
 
 int main()
@@ -454,5 +538,7 @@ int main()
         export_executor_dispatches_file_stem_collection_and_named_exports);
     harness.run("export executor preserves failed directory creation", export_executor_preserves_failed_directory_creation);
     harness.run("export executor rejects malformed targets", export_executor_rejects_malformed_targets);
+    harness.run("video export executor dispatches animation and timelapse", video_export_executor_dispatches_animation_and_timelapse);
+    harness.run("video export executor rejects empty paths", video_export_executor_rejects_empty_paths);
     return harness.finish();
 }