If you are looking for a general media player, I would use Kinoma... It plays flash videos... Kinoma is the best media player out there in my opinion.. It lets you play YouTube clips straight from the program and your also able to log into your account to access your favorites and playlists... It works with most of the video and audio codecs out there... And you can use it to view pictures also... I use the free version.. The link below is where you go to download it...
http://kinoma.com/freeplay/download/