I also use downloadhelper a lot.Site:
https://addons.mozilla.org/en-US/firefox/addon/3006 There is also youtube-dl
which can be installed by the command sudo aptitude install youtube-dl and when
using it open the Terminal, type youtube-dl hit space then copy and paste the
URL of the site of the online movie and it downloads it to the Home folder.
But Downloadhelper is a lot better. It also creates a Dwhelper folder in the
Home folder where it downloads the movies, usually files with .flv extension,
which can be played with Mplayer or, better, VLC Player.
Both players are in the repositoriessudo aptitude install vlcsudo aptitude
install mplayer