The temporal workaround 4.9.10b2 makes it just worse Rated 3 out of 5 stars

Hello,

before installing the 4.9.10b2 I got the same issue as the most people - 0 bytes or just not downloading anything.

After installing 4.9.10b2 the situation is that there is no recognizing anymore - the tool bar button stays greyed out, only the context menu is available.
The widget button within youtube sites doesn't start a download too.

This review is for a previous version of the add-on (4.9.9).  This user has other reviews of this add-on.

Just clear your browser cache and reload the yYouTube page.