flash replacement

[Andrew Z]

hello,
 is there an alternative for ( lots of grumpy swearing omitted ) flash
plugin in FF? with the latest 11.2.202.251 x86 release the HD videos in
full-screen a crashing.
[bitching on]
 first i deal with an invasion of Avatars - "the blue people" and now $$$
thing won't even play for longer than 4 minutes in full screen
[bitching off]