@Fab

If you have a link to such a site, that doesn't require a particular account (especially if it's not free :)), i could have a look and see what can be done. My guess is that I could write some "dummy" video owb plugin, acting as standard window media player plugin, and dumping the url, so that you can play it externally in mplayer.

The link: http://www.tampabaydowns.com/DailyReplays.aspx
Choose a highlighted day and the javascript asks for a race. Click race choice and the OWB returns "unsupported protocall.".
The mms address is visible in histor and when copied and pasted into MPlayer is played.
Would you try the link and see how it downloads?
Again Ty Fab