Install smtube by entering the following commands in the terminal:
sudo apt update sudo apt install smtube
Description:
YouTube videos browser
SMTube is a stand-alone graphical application which allows one to search and download Youtube videos. Although it is part of the SMPlayer project, it can be used with any multimedia player such as MPlayer, MPlayer2, VLC, Totem or Gnome-MPlayer.
Homepage: http://smplayer.sourceforge.net/smtube.php
Version: 15.5.10-1build1
Section: universe/video