High Resolution YouTube

Comrade Danny Choo reports that adding the parameter "&fmt=18" to the end of a Youtube video url will allow you to watch Youtube videos in high resolution. The higher resolution, however, also means that you're gonna need more time to stream the video.
(If you didn't understand that, it just means to "add &fmt=18 to the end of the Youtube video link)

Of course, with such great news, who would want to try it? I did.

Unfortunately, after trying it out with multiple videos (videos where the "&fmt=18" parameter was reported to be working), There is not much of a difference. If any difference, it is very minimalistic, like in the following picture:


Take a look at Lockon's (guy on the left) left arm (HIS left arm, the arm on the right from your view). Compare the top and bottom pictures and you'll notice an extremely slight difference. (You will need to full view to see it)

Also reported (this by other comrades) was that the sound had improved with the "&fmt=18" tag. Once again, no difference.

In the picture:
Top video is http://www.youtube.com/watch?v=JIls2e2eU7c&fmt=18
Bottom video is http://www.youtube.com/watch?v=JIls2e2eU7c

Here's Danny's video comparison:


As you can see, in his comparison there is a very obvious change.

Top video is http://jp.youtube.com/watch?v=bygdRMCwC6s&fmt=18
Bottom video is http://jp.youtube.com/watch?v=bygdRMCwC6s

If you're going to/have tried it, let me know what happens. Whether there was a change or not, etc.

Danny's comparison taken from dannychoo.com.