It works and it also did before I wrote previous post.
It's only a pitty the mobile version of yotuube doesn't work: http://m.youtube.com
It makes a link to WMP, opens WMP and there appears an error.
Earlier I had FlashVideoBundle but I had to uninstall it because Flash 3.1
Opera 1957 : http://forum.xda-developers.com/showthread.php?t=425268
It is highly advised to delete every trace of previous builds as they said. Then it works like a charm.