Where does the extension get its data?
The extention gathers likes and dislikes on videos by extention users, and extrapolates that ratio to total likes on the video. Then it is added to archived dislike count if it exists.
What data does the extension collect from the user?
The extention collects likes and dislikes made on videos by users these are stored on the DB as being made by a unique random ID.
Can you add a way for channels to share their dislike counts?
Currently there is not way, but methods are being looked into to securely share their dislike counts.