I have a very very slow internet conection ( 512Kb/s) with infinitum that mean i have behind of 50Kb of download.
So for seen youtube or flash videos are very slow conection, the videos stop for refill the cache buffer y blah blah blah... SLOW!!!
I found youtube-dl with can download the .flv file from youtube and play it with mplayer only pass a params for do it
first:
youtube-dl http://www.youtube.com/watch?v=cG-gMJfmGKA -o out
and When is downloading can play it with mplayer
mplayer out
And video open ..... thats is great!!!
On Foresight:
sudo conary update youtube-dl=@fl:2-devel mplayer