Update app.py

app.py

@@ -93,6 +93,12 @@ def is_image(filename):
     ext = os.path.splitext(filename)[1].lower()
     return ext in image_extensions
 
+import os
+
+def is_video(filename):
+    video_extensions = ['.mp4', '.avi', '.mov', '.mkv', '.flv', '.wmv']
+    ext = os.path.splitext(filename)[1].lower()
+    return ext in video_extensions
 
 
 def load_model_and_tokenizer():