If you are experiencing issues where some YouTube videos seem to work fine with MySpeed while others do not, you may have been put into the YouTube HTML5 Trial.  

The reason why some videos still work is that videos with advertising are still displayed with Flash reguardless of your HTML5 Trial status.  To check if you are in the HTML5 Trial or not, view this page at YouTube:

http://www.youtube.com/html5

If the button on that page is "Leave the HTML5 Trial", click that button.

Update: Windows users can now upgrade to MySpeed for Windows Version 5 which does support HTML5 video.

Applies to: MySpeed for Windows Version 3 and MySpeed for Mac

Operating System: Windows and Mac

Browsers: Internet Explorer 9+, Firefox and Google Chrome