It looks like they support widescreen format now, but if you have a 4:3, it plays centered in the widescreen area at the 4:3 aspect ratio.
Heck, even my videos that were capped at 16:10 and previously forced to play at that ratio in a 4:3 screen are now playing in the whole area, so they look just as good.
OK, great! YouTube now supports 16:9. This new development isn't even a blip on my "bad day" meter.
If they're going to use a 16:9 window, then all 4:3 video should now play pillar-boxed in the window. This is OK and as it should be, at least they aren't stretching the 4:3 content to fill the 16:9 windows like CNN. Any 16:9 content that has been uploaded previously as letterboxed 16:9 in a 4:3 frame is also playing as it technically should and, in fact, isn't being displayed any smaller than it ever was, it just looks "odd" because of the new 16:9 window. I guess I'll create a 16:9 video at 640x360 (instead of a 4:3 video at 480x360), upload it and see what happens.
I noticed the new 16:9 player today and at first my HD videos that I uploaded were letter boxed and pillared. Now they are fine and the HD ones actually look pretty good. Youtube must have been saving the original files. I'm guessing they are running a script behind the scenes and converting older vids in the background.
Ya Jeff no comparison at all. Vimeo looks so sharp and crisp. The colours are vibrant. Youtube looks flat and grey on HQ, the regular setting looks horrible.
FYI, most YouTube videos can be viewed in higher than normal quality by adding "&fmt=18" to the URL. Now you can also use "&fmt=22" to get 720p or something. Probably not available on many videos yet..
I thought that &fmt=18 was doing the same thing as clicking HQ, that has been around for a while and before you had the option to click HQ. I can not tell a difference on my clip when clicking HQ or adding &fmt=18.
But &fmt=22 automatically plays it in 720p and it looks better than HQ alone. My clip is 720p.