Part of macOS

`PIPAgent`Picture in Picture

○ Leave it

Shows video in a floating window.

What it is

Runs Picture in Picture windows for apps that play video.

If you stop it

macOS starts it again straight away. Leave it.

○ Leave it. Part of macOS, or something that starts again by itself. You never need to close these.

From Procession’s guide, in the words the app shows.