Check the Winks plugin, it does some ugly check, but it's something
Thanks! Checked and used!
New version, now plugin has this behaviour:
In Linux:With gtkmozembed or webkit and gnash : everything works (in conversation, popup and showing in firefox).
Without them: shows the video it in firefox
In Windows:Always show the video in web browser.
In both systems you can save or ignore the video, too.
The only thing that I'm willing to fix is that when you see the video in the web browser you're not able to save it (at the same time).
It's a pity that adobe flash doesn't work anymore....