There are lots of ways you can go about doing that. Another thing you can do is upload it to YouTube and use their embedding code. That's another free way to do it. Also there are a ton of other sites like YouTube that you can upload it to and get an embedding code.
If you'd like video play in flash player you might also want to check out
http://www.longtailvideo.com/players/jw-flv-player/