urls=yuchao_url.split("\n")
for url in urls:
url=url.strip()
if url=="" or url==None:
continue
print(url)
yt = YouTube(url,proxies=proxies_all,on_progress_callback=download_callback)
#¦pªG¦b国¥~¤£设¸m¥N²z¡A§ó§ï¦p¤U
#yt = YouTube(url,on_progress_callback=download_callback)