After a while, here's a nice "compilation" as to how can people freely download any U2B (youtube) video in HD, FLV, MP4 or MP3 format. The catch is, you have to use Mozilla Firefox (Mozilla Firefox Download).
First, the Mozilla Firefox add-on that allows fetching U2B videos:
THE FIREFOX ADD-ON
As for those who would like to download, or already have downloaded, (HD) flv (or mp4) and want to convert it to a MP3 or similar music/video file, google some free conversion tool ...
And here's a lil' something for web-pages tat contain embedded video:
DOWNLOAD EMBEDDED VIDEO ADD-ON
After installing the add-on and restating Firefox, you can see and download any video that's embedded on the web-page you're viewing by clicking on the add-on button located left of the address bar.
Hope it helps :)
