[aliqot]

http://returnyoutubedislike.com/

[queuebert]

Do these extensions track the dislikes externally, or do they somehow bring it back on YouTube's side?

[fkarg]

they track externally and extrapolate, so it's skewed based on audience (they also made a 'backup' from when yt still showed them)

still, I found it more useful than not