Update app.py

app.py

@@ -73,7 +73,7 @@ with gr.Blocks(css="app.css") as video:
         with gr.Row():
             with gr.Column(scale=2):
                 input_video = gr.Video(
-                    sources=["webcam", "upload"], elem_classes="video1"
+                    sources=["webcam", "upload"], elem_classes="video1", format='mp4'
                 )
                 with gr.Row():
                     clear_btn_dynamic = gr.Button(