One was for collecting the tapes, one was for surviving with her plush on the desk and the last was for the driving minigame. Prior to the update the mini game was playable from the menu. Haven't seen where they moved it in 0.5 update
same here, but , quote:
From TheThunkening:
I got the last poppi video from the car mini-game when it popped up after a death, so it might be a random death game thing.