Well, maybe you guys seen this, but I'm sharing this topic to people who don't know this or just wants to.
To download youtube videos.
Requirements: Mozilla (3.0 or up) Mozilla Add-on Free FLV Converter
1. Have Mozilla 3.0 or up 2. Download Video DownloadHelper 4.6.4 (Mozilla Add-on) Link: https://addons.mozilla.org/en-US/firefox/addon/3006 3. Go to Youtube.com and go to a video. 4. When in, Mozilla have 3 balls next to address bar. Click it. 5. Download or Quick Download and save it to Desktop! 6. Download Free FLV Converter Link: http://www.brothersoft.com/prism-video-converter-56002.html 7. Install it 8. Got to it and press "Conversion from FLV" 9. Pick the video file 10. Download and wait.
Done. You know have a Youtube video. It'll come into your Desktop.
They don't allow you to download vidoes, but the flv's can be downloaded and converted to other formats such as mpeg or mp3 (audio only) so someone could grab music off youtube, or just share videos on other sites or however they feel like after downloading them, or even just collect funny videos.