Answering my own question in case anyone cares: The membership multipliers do not apply and looks like I was wrong about the boosts having any influence as well. The range is pretty wide from like 20 to 230 and seems to be random (?). If no videos are available you get the XP and you don't have to watch anything, if a video pops up you get the XP and the same 2 credits reward from video offers in the "earn free credits" section.
But even with the wild variations in the XP points awarded and not benefitting from multipliers.. 1 hole coin match+video remains one of the most efficient ways to grind XP.