Youtube: "Go upgrade!"

Hi,

Since today Youtube seems to refuse to play videos, telling me to 'go upgrade' my flash player. Is this the result of swfdec not being maintained (I read that somewhere on this forum) and does anyone using gnash have the same problem? I wonder whether google somehow dropped support for older flash players, which I presume you could compare swfdec and gnash to. Because I was under the impression that you didn't need the newest flash player to view youtube videos.