Recently, I noticed an increasing number of videos on YouTube were no longer available – even if they had just been shared through a blog post by friends or even if they were the main video on a producer’s YouTube page, such as QuantumOfSolace.

I was suspicious for a while that there was something wrong with my browser, but when my colleague was able to play the video from the same network and I wasn’t, something had to be done.

I am running Firefox 3.0.4 on OS X 10.5.5 with the Flash 10.0 d26 plugin. First we thought it might be blocked for au.youtube.com and not for www.youtube.com, but there was no difference. Still the same “Sorry, this video is no longer available”.

Finally, an installation of the latest Flash plugin 10.0 r12 fixed the issue. So, if a large number of videos on YouTube isn’t available to you for no apparent reason, you might want to upgrade your Flash plugin.