diff --git a/frontend/src/components/Constructor/CanvasBackground.tsx b/frontend/src/components/Constructor/CanvasBackground.tsx
index 5f2a6ff..3cd7b5d 100644
--- a/frontend/src/components/Constructor/CanvasBackground.tsx
+++ b/frontend/src/components/Constructor/CanvasBackground.tsx
@@ -33,6 +33,8 @@ interface CanvasBackgroundProps {
   videoMuted?: boolean;
   videoStartTime?: number | null;
   videoEndTime?: number | null;
+  /** Original storage path for video - used for play-once tracking (not the resolved blob URL) */
+  videoStoragePath?: string;
 }
 
 const CanvasBackground: React.FC<CanvasBackgroundProps> = ({
@@ -50,10 +52,13 @@ const CanvasBackground: React.FC<CanvasBackgroundProps> = ({
   videoMuted = true,
   videoStartTime = null,
   videoEndTime = null,
+  videoStoragePath,
 }) => {
   // Use background video playback hook for custom start/end time handling
+  // Use storagePath for play-once tracking (falls back to videoUrl if not provided)
   const { videoRef, shouldBlockAutoplay } = useBackgroundVideoPlayback({
     videoUrl: backgroundVideoUrl,
+    videoStoragePath: videoStoragePath || backgroundVideoUrl,
     autoplay: videoAutoplay,
     loop: videoLoop,
     muted: videoMuted,
diff --git a/frontend/src/components/RuntimePresentation.tsx b/frontend/src/components/RuntimePresentation.tsx
index 39184b5..6f2e1b9 100644
--- a/frontend/src/components/RuntimePresentation.tsx
+++ b/frontend/src/components/RuntimePresentation.tsx
@@ -653,6 +653,7 @@ export default function RuntimePresentation({
                 videoMuted={videoMuted}
                 videoStartTime={videoStartTime}
                 videoEndTime={videoEndTime}
+                videoStoragePath={selectedPage?.background_video_url}
               />
             </div>
             {/* End page background wrapper */}
diff --git a/frontend/src/hooks/useBackgroundVideoPlayback.ts b/frontend/src/hooks/useBackgroundVideoPlayback.ts
index 28aab6f..10e4440 100644
--- a/frontend/src/hooks/useBackgroundVideoPlayback.ts
+++ b/frontend/src/hooks/useBackgroundVideoPlayback.ts
@@ -16,8 +16,10 @@ import { logger } from '../lib/logger';
 const playedVideos = new Set<string>();
 
 export interface UseBackgroundVideoPlaybackOptions {
-  /** URL of the video to play */
+  /** URL of the video to play (may be a blob URL) */
   videoUrl?: string;
+  /** Original storage path for play-once tracking (stable across navigations) */
+  videoStoragePath?: string;
   /** Whether to autoplay the video (default: true) */
   autoplay?: boolean;
   /** Whether to loop the video (default: true) */
@@ -58,6 +60,7 @@ export interface UseBackgroundVideoPlaybackResult {
  */
 export function useBackgroundVideoPlayback({
   videoUrl,
+  videoStoragePath,
   autoplay = true,
   loop = true,
   muted = true,
@@ -66,8 +69,12 @@ export function useBackgroundVideoPlayback({
 }: UseBackgroundVideoPlaybackOptions): UseBackgroundVideoPlaybackResult {
   const videoRef = useRef<HTMLVideoElement | null>(null);
 
+  // Use storage path for tracking (stable across blob URL changes)
+  // Falls back to videoUrl if no storage path provided
+  const trackingKey = videoStoragePath || videoUrl;
+
   // Block autoplay if video already played this session (only when loop=false)
-  const shouldBlockAutoplay = !loop && videoUrl ? playedVideos.has(videoUrl) : false;
+  const shouldBlockAutoplay = !loop && trackingKey ? playedVideos.has(trackingKey) : false;
   // Store current values in refs for event handlers to access
   const startTimeRef = useRef(startTime);
   const endTimeRef = useRef(endTime);
@@ -188,12 +195,13 @@ export function useBackgroundVideoPlayback({
 
   // Session-scoped "play once" behavior when loop is disabled
   // Videos that have already played show last frame on revisit
+  // Uses trackingKey (storage path) for stable tracking across blob URL changes
   useEffect(() => {
     const video = videoRef.current;
-    if (!video || !videoUrl || loop) return;
+    if (!video || !videoUrl || !trackingKey || loop) return;
 
     // If video already played this session, show last frame
-    if (playedVideos.has(videoUrl)) {
+    if (playedVideos.has(trackingKey)) {
       const showLastFrame = () => {
         video.currentTime = video.duration - 0.01;
         video.pause();
@@ -208,11 +216,11 @@ export function useBackgroundVideoPlayback({
 
     // Mark video as played when it ends
     const handleEnded = () => {
-      playedVideos.add(videoUrl);
+      playedVideos.add(trackingKey);
     };
     video.addEventListener('ended', handleEnded);
     return () => video.removeEventListener('ended', handleEnded);
-  }, [videoUrl, loop]);
+  }, [videoUrl, trackingKey, loop]);
 
   return { videoRef, shouldBlockAutoplay };
 }
diff --git a/frontend/src/pages/constructor.tsx b/frontend/src/pages/constructor.tsx
index 23e0bc8..dc02626 100644
--- a/frontend/src/pages/constructor.tsx
+++ b/frontend/src/pages/constructor.tsx
@@ -1534,6 +1534,7 @@ const ConstructorPage = ({ mode = 'constructor' }: ConstructorPageProps) => {
                 videoMuted={backgroundVideoMuted}
                 videoStartTime={backgroundVideoStartTime}
                 videoEndTime={backgroundVideoEndTime}
+                videoStoragePath={backgroundVideoUrl || activePage?.background_video_url}
               />
             </div>