python download video from website without knowing file name

Question

i am wondering how it is possible to download a video from a website.

import urllib
testfile = urllib.URLopener()
testfile.retrieve("http://randomsite.com/file.gz", "file.gz")

I understand that the above script is able to download a file as long as you have the file extension. What i am wondering is how do i download a file without knowing it's extension? How do i make a program that will download a video via inserting the videos url "Such as when you right click and copy video url"

If someone could point me in the right direction that would be appreciated !

Answer 1

from __future__ import unicode_literals
import youtube_dl

ydl_opts = {}
with youtube_dl.YoutubeDL(ydl_opts) as ydl:
    ydl.download(['YOUR URL'])

I was able to download videos from a none youtube site with the above code :)