How do you put non Flash videos on YouTube?

[Baby Astronaut]

These two videos worked. Normally, it displays a message saying I need to install a Flash plugin, but instead it played the video using HTML5 technology. Awesome!

 

http://www.youtube.com/watch?v=kmk43_2dtn0
http://www.youtube.com/watch?v=ESZ3NFL8X-k

 

But unfortunately other videos there are still in Flash. Just want to know in case I upload videos, I'll make sure they're HTML5 playable. I used Firefox, newest version.

Edited December 21, 2011 by Baby Astronaut

[Cap'n Refsmmat]

YouTube does the video encoding themselves. (Playing video in the HTML5 format requires re-encoding them in a couple formats.) However, they haven't gotten around to redoing every video in their entire database, and certain videos, like those with advertisements, can't be played in the HTML5 form.

 

https://www.youtube.com/html5