WTF is going on with my two monitors?

Right, so this has been an issue before and about a week ago it stopped so I didnt think more of it, all of a sudden this happened & its about 2-3 times today this has happened.
I decided to make a video of it on my phone because I have no idea how to explain what is going on, could someone give me some insight on what it is?
https://www.youtube.com/watch?v=-cPJs3Abcqw
I decided to record what was going on as I simply couldnt find a way to properly explain my issue
I decided to make a video of it on my phone because I have no idea how to explain what is going on, could someone give me some insight on what it is?
https://www.youtube.com/watch?v=-cPJs3Abcqw
I decided to record what was going on as I simply couldnt find a way to properly explain my issue