How to temporarily change player camera to "external BP" camera?

And if you switch to that camera via “Set View Target with Blend” the camera is still watching you? While player is in the trigger box I need to be looking at him through that security camera which should be rotating to keep the player in the view.
I got the triggers, camera and all that working. It’s just when I switch to the camera via “set view…” the camera stays static.