Screen darkening and glitching.

I have deleted mc, deleted the folder, checked my java, everything, and it still continues to glitch in singleplayer and multiplayer.

Here is a video of it in singleplayer
https://vimeo.com/248747974

It was fine 2 days ago. No new monitor, nothing. It's happening on multiple computers, and multiple. I have no " non-standard client/server/launcher build"
No resource packs or anything(seeing I reset my mc folder) It is only on any mc client I try.