A music video thats consider to be one of my favourites is from an anime called "One Punch Man". The music video shows the protagonist wondering the world and showing off just what he is capable of doing which the series is all about. It shows how he develops from alone to starting to make friends. It also shows that he wields unlimited power but that comes with it's own challenge of never having any worthy opponents.
The music video was created by a team of animators called "Mad House" and the song itself was created by Makoto Miyazaki.
Link to music video: https://www.youtube.com/watch?v=atxYe-nOa9w
Tonight Tonight https://www.youtube.com/watch?v=NOG3eus4ZSo