Great tool!

I use this mainly in the world of media research, documentation, and archival, and being able to take a screenshot at perfect resolution is a great feature! Namely, the current resolution of the video (1080p or 720p etc. with no compromises).

Comparable to downloading the YouTube video, opening it in VLC, and taking a screenshot there. It's way faster and way more convenient.

Edit from four months later: somehow it's even better. Regular updates are good, but what I pay attention to is archival quality.

Today I specifically compared a 1080p screenshot from this add-on to screenshots from VLC of the video as downloaded in WEBM and MP4 file format.

The screenshot as obtained from this add-on matched the WEBM screenshot pixel-for-pixel(!!!), and the MP4 screenshot did not match.

Firstly I actually didn't know that YouTube's MP4 files underwent more compression than their WEBM files (of course a file format is just a file format; an MP4 can be lossless or compressed to hell, but YouTube compresses videos in a consistent manner).

And secondly I am impressed! Thank you for the high quality add-on, this is going to be a part of my toolkit for a long time to come.