Brilliant add-on Rated 5 out of 5 stars

It's a brilliant add-on.
However, it stopped working with YouTube. :-(
EDIT: I confirm that deleting cookies for YT and reloading the page helps. V DH works with YT after that again.

This review is for a previous version of the add-on (4.9.9.1-signed).  This user has a previous review of this add-on.