Beeing a man, that doesn t like to have multiple tools installed, that nearly do the same job, I use this tools
1.
http://www.erightsoft.com/SUPER.html
this tool allows you, to convert any file (audio & video) from any format to another format, so you don t need to install freeFLV and other tools, cause super does it all. It s simple to configure, and it brings all needed codecs within. (the only thing to mention is, that this tool is not for older, slow pc)
2.
https://addons.mozilla.org/de/firefox/addon/3006
allows you to download any mediafile fron nearly every side, and after trying all these youtube aso tools (with their annoying "file not found"... messages), this is my first choise. Check the configuration of this tool, and it offers you, to install a FLV to AVI converter, so, if you leech a file from youtube, myvideo, metacafe, xvideo, empflix..., you get an already converted .avi file. Give this a try, you ll be surprised, what a good job it does, I don t wanna explain all to you, you know, music industry and copyrights.
OK, I have two tools, that convert on my pc, but why should I down a FLV and convert it to AVI manually, when I could get an AVI file?
3.
https://addons.mozilla.org/de/firefox/addon/9251
I think, I don t need to say anything bout that, the pics and the description on the moz down side says all
HF