any plugins that you recommend for saving youtube videos to your computer?

online: www.keepvid.com
addon: download embedded
greasemonkey script: "YousableTubeFix"
etc

Greasemonkey can be used.
There's a script that adds a download link on Youtube so you can save the video. I think this is the one.

downloadhelper.
http://www.downloadhelper.net/

I use FAST VIDEO DOWNLOADER

http://rpocc.livejournal.com/43565.html

Its very easy to use.

+1 to that!!!
It also works with Firefox 3 beta 4 but not 5 yet.

better youtube handsdown best youtube extension ever!!! go lifehacker for this excellent plugin!
theres an easy download button that shows up right next to favorite this button etc... plus there are really cool options like a much better flash player thingy.

Free download manager will download them AND convert them to avi/ mpg.

The Best solution to save youtube videos into your pc/mobile is vdownloader. VDownloader is a computer software that helps you download and save videos from the Internet. Download videos from YouTube, MySpace, iFilm, DailyMotion, Metacafe and much more. You can also convert videos using VDownloader. VDownloader comes packed with features you cannot afford to miss. VDownloader will help you keep those great video clips you always wanted to keep.

+2

If you use Internet Download Manager, it does the job too. =D

i use download helper, definitely gets my recommendation.

ive been using Unplug, works with many other sites as well.

https://addons.mozilla.org/en-US/firefox/addon/2254

Another vote for DownloadHelper here as well. Works great on almost any site that has some kind of embedded media.