fix fixed string error

video_utils.py

@@ -131,8 +131,10 @@ def generate_clips(cache_dir, info):
             clip = video.subclip(start_time, end_time)
 
             # Generate output filename
-            output_filename = f"{CLIP_DIR}{
-                yt_id}-{start_time}-{end_time}.mp4"
+            output_filename = (
+                f"{CLIP_DIR}{yt_id}-"
+                f"{start_time}-{end_time}.mp4"
+            )
 
             entry['metadata']['download'] = output_filename