http://www.flashvideodownloader.org/ I prefer this one because it's a Mozilla-approved FF extension (also available for all the other big browsers) and in addition to the option to have the dl button on the toolbar, they also embed a dl button on every youtube page. It's the only youtube video downloader I've used that has ALWAYS worked and it works on a lot of sites that the other downloaders don't.
Re: Downloading (fan-)vids from youtube?
I prefer this one because it's a Mozilla-approved FF extension (also available for all the other big browsers) and in addition to the option to have the dl button on the toolbar, they also embed a dl button on every youtube page. It's the only youtube video downloader I've used that has ALWAYS worked and it works on a lot of sites that the other downloaders don't.