&fmt=18

[trodLAN]

If you add this: "&fmt=18" after a video in YouTube, you can watch each video in higher rez (480x360 pixel resolution - instead of 320 x 240 pixels.

Like this:
http://www.youtube.com/watch?v=KVeVKtCNtyI (low quality)
http://www.youtube.com/watch?v=KVeVKtCNtyI&fmt=18 (HQ)

I guess all Youtube videos will be 480x360 pixels in the future...

There is made a plugin for Firefox-users - get it here:
https://addons.mozilla.org/en-US/firefox/addon/6460

[petrabandca]

trodLAN,

That is incredible! How did you come up with that? I tried it on a few Petra videos on YouTube and I got different results, but saw some changes. That example you gave was night and day!

Does this only work with YouTube?
James