I'll add here Cutube 2
Browse, search, share, play and download videos.
Browse and search playlists and channels.
Access videos, playlists and subscriptions across multiple accounts.
User-definable authentication credentials.
Support for additional services via plugins.
cuteTube2 uses the GPL v3 license. The source code is available at GitHub.
cutetube2 (0.2.2) unstable; urgency = low
* Plugin API changes.
* UI tweaks.
* Minor bug fixes.Version 2 0.2.2