Hier findet ihr den Opera Browser für Linux mit .flv Support
hoffe das hilf euch auch ein bisschen weiter 
The most important is that we've fixed some issues with Flash 9 on Linux. This means that you can now watch YouTube video fullscreen! (And close annyoing Flash ads.)
Other changes
* Added support for automatic search from address bar when entering more than one word;
* Some speed optimizations in the Speed Dial skin;
* Added support for the optional “key” in BitTorrent requests, should make more torrent downloads work;
* Fixed issue with transparent areas in some widgets on UNIX;
* we have now ppc-linux .6 packages: that means that they work (okay, should work) on your PS3! — if you installed Linux on it.
