document updated 10 years ago, on Sep 15, 2013

YouTube has implemented some anti-copying methods, and some download programs have stopped working. Ones that may still work:

extensions that work in Chrome OR Firefox
- YouTube HD Suite
Chrome extensions
- YouTube Options
Firefox extensions
- Unplug [yup, this works great]
- DownloadHelper
Linux native application
- TubeMaster++ (haven't tried it yet)
- more
- cclive (Ubuntu package "cclive")
- Clive (Ubuntu package "clive")
- youtube-dl (Ubuntu package youtube-dl)
Windows native application
- Replay Media Catcher (trialware, but it's available on BitTorrent)