app.py

from __future__ import unicode_literals
#import youtube_dl as yt 
import gradio as gr 
import youtube_dl

def dl(inp):
    out = None
    
    ydl_opts = {}
    with youtube_dl.YoutubeDL(ydl_opts) as ydl:
        out = ydl.download([f'{inp}'])    
    return out 


with gr.Blocks() as app:
    inp_url = gr.Textbox()
    go_btn = gr.Button()
    outp_vid=gr.Video()
    go_btn.click(dl,inp_url,outp_vid)

app.launch()