You are King
Lot of Japanese songs have lot of covers, each of them have really different interpretation of the song (and a nice custom thumbnail)
Since I really like that variety, I made a website to display all of them side by side
My general guideline is to take all covers that were posted by an official YouTube channel (that means I don’t take the ones that were from some karaoke streaming)\
Also the cover must fit a minimal quality requirement (for that I mostly use the number of views)