How can I make this distort/glitch/error effect?

Hello.

I was wondering how I could create this effect.. I don't know how to call it.. er.. glitch/distort/error effect that appears in this video: https://www.youtube.com/watch?v=uKGUZswmGZM

Timestamps:

• 1:18
• 1:35
• 2:13

You get the idea.

You see, a part of the screen freezes and somehow another part of it keeps playing. That's what I'm looking for.

I would appreciate any help. Thanks a lot.