Update app.py

app.py

@@ -48,7 +48,7 @@ with gr.Blocks(css="app.css") as demo:
         gr.Markdown(value=DESCRIPTION_DYNAMIC)
         with gr.Row():
             with gr.Column(scale=2):
-                input_video = gr.Video(sources=["webcam", "upload"], elem_classes="video1")
+                input_video = gr.Video(sources=["webcam", "upload"], elem_classes="video1", format='mp4')
                 with gr.Row():
                     clear_btn_dynamic = gr.Button(
                         value="Clear", interactive=True, scale=1