youtube-dl is a Python based small command-line tool that allows to download videos from YouTube.com, Dailymotion, Google Video, Photobucket, Facebook, Yahoo, Metacafe, Depositfiles and few more similar sites. It written in pygtk and requires Python interpreter to run this program, it’s not platform restricted. It should run on any Unix, Windows or in Mac OS X based systems.

Recently, youtube-dl added video download support for 17 new websites: brightcove.com, auengine.com, RingTV, instagram.com, Jukebox, 3sat, CSpan, Statigr.am, traileraddict.com, hotnewhiphop.com, wat.tv, tu.tv, gamespot.com, tudou.com, Wimp.com, archive.org and break.com

Full article here:
Install YouTube-DL – A Command Line Video Download Tool for Linux (Tecmint)
Related articles:
How to Install and Use YouTube-DL on Ubuntu 18.04 (LinOxide)
5 youtube-dl tips you might not know about (SG)