Hey there, first post on here so if this is the wrong section let me know.

So, I was trying to mimic a rather interesing effect this guy uses in his videos.

https://www.youtube.com/watch?v=qMDiSlB0SFk

If you look carefully, the image gets like distorted, somewhat blurry or smeared whenever he moves around fast or something moving fast is on frame. You can clearly see it in the bottom right corner, where the ammo and heath bars are.

I was wondering if you guys know how exactly he does this, because this game's recorded footage is ofter very dull and this makes it look that much better.

Thank you.