For this who want to collect videos from YouTube, I wrote a little script (embedded in StatusQuo) to help video fetching. You just give the YouTube URL, and the script will fetch the .flv file and give you a link to download it. At the bottom of the page are listed all fetched videos (so you can download, some of already fetched videos) - link

One platform solution for Windows and Linux users is the Mplayer (http://www.mplayerhq.hu) with codecs for FFmpeg Flash video. With Mplayer you can watch your .flv videos.

There’s also a easy solution (for Linux users) to convert the .flv to AVI’s and MPEG’s, so if anyone needs a solution, I can post a how-to or online version to convert.

Here’s the link.