Download videos from Youtube, Google, Metacafe, iFilm, Dailymotion... and other 60+ video sites ! And all embedded objects on a webpage (movies, mp3s, flash, quicktime, etc) ! Directly !

VideoDownloader add a small icon on the status bar at the bottom of your firefox window, and a toolbar button. Just click that and download the video you are watching !

Sites supported:
Youtube, Google Video, iFilm, Metacafe, Dailymotion, Myspace, Angry Alien, AnimeEpisodes.Net, Badjojo, Blastro, Blennus, Blip.tv, Bofunk, Bolt, Break.com, Castpost, CollegeHumor, Current TV, Dachix, Danerd, DailySixer.com, DevilDucky, Double Agent, eVideoShare, EVTV1, FindVideos, Free Video Blog, Grinvi, Grouper, Hiphopdeal, Kontraband, Lulu TV, Midis.biz, Music.com, MusicVideoCodes.info, MySpace Video Code, Newgrounds, NothingToxic, PcPlanets, Pixparty, PlsThx, Putfile, Revver, Sharkle, SmitHappens, StreetFire, That Video Site, TotallyCrap, VideoCodes4U, VideoCodesWorld, VideoCodeZone, vidiLife, Vimeo, vSocial, Yikers, ZippyVideos... and any other webpage with embedded objects.

Download the add on https://addons.mozilla.org/firefox/2390/