Doesn't work on videos opened in new tabs. EDIT: I don't know what kind of example you want. Just go to youtube and open any video with a wheel click or with right click -> open link in new tab, the annotations won't be disabled.
I don't bother signing in to youtube anymore and I don't allow cookies from them either, and that means that every time I watch a video, all the settings go back to default, which puts the annotations back on. They are always annoying and irrelevant and I got sick of having to turn them off repeatedly. This add-on eliminates the annotations and makes watching a youtube video tolerable once again. If you want to get rid of annotations, this is a very simple add-on and it works. A big thank you to the developer.
i was first confused by the fact that annotations are still turned on in the options menu, but annotations are effectively removed.
So this is also the only weakness. You cannot turn annotations on and off the usual way (clicking th youtube option gear). Perfect would be, if you can just change the default setting to off.