I noticed that Youtube is getting a bit buggy lately. I get a lot of 'Sorry, this video is no longer available' when I try to replay a vid that I was watching a minute ago. Even worse, now I can watch the videos with that message! Look at the screenshot.
I've had that randomly, not on embedded vids though because I dislike watching that way. Refreshing the (youtube video) page has helped.
On a forum I saw a problem where some guy had that text on a video that worked for everyone else. That was weird because the video didn't work for that guy even if he tried it couple of hours later.
I hate how horrible the sound quality is on youtube. It's only 22050Hz sample rate. So it can't reproduce sounds with a frequency greater then 11025Hz. Unless it is high quality &fmt=18.
Stupid that the "high quality" link is actually fmt=6 instead of fmt=18.
Difference between fmt=6 and fmt=18 from wikipedia: "YouTube's high quality videos are available in two versions, both of which have a maximum picture size of 480 x 360 pixels. By adding &fmt=6 to the web address of a video, it is played using the H.263 codec with mono sound, and by adding &fmt=18, it is played using the H.264/MPEG-4 AVC codec with stereo AAC sound."
There seems to be problem with some very few videos with fmt=18. Video is very jerky with with fmt=18 when with "high quality" or fmt=6 it's smooth. So I guess fmt=6 and "high quality" is same thing.