I'm not a lawyer and I have no legal training - god, I wish! I'm using the word 'settlement' bc that's the word commonly being used in everything that I've seen or read. I'm pretty sure I've heard Tom Mesereau using that term in various interviews when he's been asked to comment on it. Of course, that could be bc he doesn't want to get into technical legal stuff that the rest of us won't understand. That's possible. I just use the language that is standard.
Here's that Pluto video again. At approx 9m 40s (and again at 9m 55s) she shows part of the settlement document onscreen. The phrase 'Confidential Settlement' clearly appears in the document and seems to refer directly to the $15m.