Thanks!! It's from a music video from an artist name Mystery Skulls.
This is the animated version of the video which was commissioned by a friend of his. it's my favorite video right now. And yes, he's basically a beefier Jack Skellington. Everyone on Tumblr is calling him "Bara Skeleton" hahaha. (Idk if you know what bara is but basically manga with big, masculine beefy gay dudes hence why he's called Bara Skeleton)