Downloading .mp4 from YouTube
 

I use to download them for my ipod but lately they don't show up in the Firefox plugin. Are you guys able to download them

greasemonkey + scripts

Try this one instead?
http://www.eusing.com/free_youtube_d...e_download.htm

Get another plugin, or maybe the one you're using has an update.

http://www.yourvideofile.com/

Works well and they're usually quick to update if any changes.

I use http://www.clipnabber.com