This PR automatically plays the video

It helps to understand how the space works.

Click on _Merge_ to add this feature.

app.py

@@ -380,10 +380,10 @@ with gr.Blocks() as demo:
                         "✨In this demo, we use [RIFE](https://github.com/hzwer/ECCV2022-RIFE) for frame interpolation and [Real-ESRGAN](https://github.com/xinntao/Real-ESRGAN) for upscaling(Super-Resolution).<br>&nbsp;&nbsp;&nbsp;&nbsp;The entire process is based on open-source solutions."
                     )
 
-            generate_button = gr.Button("🎬 Generate Video")
+            generate_button = gr.Button(value="🎬 Generate Video", variant='primary')
 
         with gr.Column():
-            video_output = gr.Video(label="CogVideoX Generate Video", width=720, height=480)
+            video_output = gr.Video(label="CogVideoX Generate Video", width=720, height=480, autoplay=True)
             with gr.Row():
                 download_video_button = gr.File(label="📥 Download Video", visible=False)
                 download_gif_button = gr.File(label="📥 Download GIF", visible=False)