diff --git a/backend/routers/techniques.py b/backend/routers/techniques.py
index 5ca68c6..7d2e676 100644
--- a/backend/routers/techniques.py
+++ b/backend/routers/techniques.py
@@ -11,7 +11,7 @@ from sqlalchemy.ext.asyncio import AsyncSession
 from sqlalchemy.orm import selectinload
 
 from database import get_session
-from models import Creator, KeyMoment, RelatedTechniqueLink, TechniquePage
+from models import Creator, KeyMoment, RelatedTechniqueLink, SourceVideo, TechniquePage
 from schemas import (
     CreatorInfo,
     KeyMomentSummary,
@@ -75,7 +75,7 @@ async def get_technique(
         select(TechniquePage)
         .where(TechniquePage.slug == slug)
         .options(
-            selectinload(TechniquePage.key_moments),
+            selectinload(TechniquePage.key_moments).selectinload(KeyMoment.source_video),
             selectinload(TechniquePage.creator),
             selectinload(TechniquePage.outgoing_links).selectinload(
                 RelatedTechniqueLink.target_page
@@ -93,7 +93,11 @@ async def get_technique(
 
     # Build key moments (ordered by start_time)
     key_moments = sorted(page.key_moments, key=lambda km: km.start_time)
-    key_moment_items = [KeyMomentSummary.model_validate(km) for km in key_moments]
+    key_moment_items = []
+    for km in key_moments:
+        item = KeyMomentSummary.model_validate(km)
+        item.video_filename = km.source_video.filename if km.source_video else ""
+        key_moment_items.append(item)
 
     # Build creator info
     creator_info = None
diff --git a/backend/schemas.py b/backend/schemas.py
index d989758..7afe140 100644
--- a/backend/schemas.py
+++ b/backend/schemas.py
@@ -286,6 +286,7 @@ class KeyMomentSummary(BaseModel):
     end_time: float
     content_type: str
     plugins: list[str] | None = None
+    video_filename: str = ""
 
 
 class RelatedLinkItem(BaseModel):