run.py

import gradio as gr
import os

def video_identity(video):
    return video

demo = gr.Interface(video_identity,
                    gr.Video(),
                    "playable_video",
                    examples=[
                        os.path.join(os.path.dirname(__file__),
                                     "video/video_sample.mp4")],
                    cache_examples=True)

if __name__ == "__main__":
    demo.launch()