Hey!
The whole process kicks off when the player enters a collision box, naturally. But the PP is spawned by the streaming code.
The warp level is just the material you can see with a camera stuck right up it 
It comes from this market place asset:
There are others, like:
Once you get further into streaming you’ll probably end up spawning the character, rather than relying on one that was placed in the level. That was my experience anyway. Hence looking for player start