app.py

import gradio as gr

def greet(name):
    return "Hello " + name + "!!"

def video_identity(video):
    return video

video_url = "https://ak.picdn.net/shutterstock/videos/21179416/preview/stock-footage-aerial-shot-winter-forest.mp4"
iface = gr.Interface(video_identity, 
                    gr.Video(), 
                    "playable_video", 
                    examples=[video_url], 
                    cache_examples=True)

#iface = gr.Interface(fn=greet, inputs="text", outputs="text")
iface.launch()