I can now inundate you with sounds and videos from my vast repertoire thanks to the FLV Embed plugin. I found that WP-FLV had trouble when you’d try to edit an existing post with an flv in it. It would lose the tag due to an incompatibility between the flv tag and the graphical input method in WordPress 2.1.
To make an entry, I just write something like this:
(open square bracket)flv:http://lee.org/blog/wp-content/uploads/2007/03/swarm.flv 360 270]