I've written a mod for embedding flash-videos of several sites (youtube, google video, sevenload, many more), too. You can test it and download the source on my test forum:
http://www.gutzeit.gooba.de/index.php
For the next version I'll cleanup the code a bit and add support for a direct conversion from urls to bbcode, just like the magic-url thing.
Currently the URL based video insertion works with:
- www.youtube.com (director video URLs supported, too)
- www.ifilm.com
- www.myvideo.de
- www.clipfish.de
- de.sevenload.com
- en.sevenload.com
- vids.myspace.com
- Google-Video
- www.brightcove.com
- www.livevideo.com
- www.travelistic.com
- www.grouper.com
- www.veoh.com
- one.revver.com
- zabim.com
- www.guba.com
- www.vimeo.com