Rated 3 out of 5 stars

Not quite what I expected.
Downloads are done externally by VideoDroid.org which requires CAPTCHA for 1080p. The site can be used without the addon so the benefit is minimal. (Although cheers to the author for creating VideoDroid.)
All 1080p audio tracks are re-encoded when the better method would have been to mux with the best available track that can be found in the 720p stream.

This review is for a previous version of the add-on (7.25.1-signed). 

Pls. CHECK before review...

a). VideoDroid.org is exclusively made for this addon.
b). Try you can't do 1080p downloads from Videodroid.org.
c). Yes, they are infact re-encoded utilizing expensive server infrastructure for you because Youtube no longer provides direct downloads for that format anymore.

Pls. edit the review after my explanation as this is the only appreciation which encourages a developer to offer services for free.