As far as people unsubscribing, I'd look at it as a winnowing. I urged you to spread out from just BP for the same reason - people who leave because they don't like the content, or because you swear, or because of where you live, or because real life forces you to not be able to put out as much content as they want, are people who would leave eventually anyway. You don't want a fickle subscriber base, and for the most part, you don't have one. It makes your channel much more stable and dependable. Every successful content creator will go through these types of "sorting out" phases.
To the contract issue - there's been no official word, but I find it interesting that YG scheduled Baby Monster's debut for November. If BP was breaking up, that wouldn't seem like a good thing to do, since that news would suck all of the air out of BM's entrance, and there would be a LOT of disappointed, angry, Blinks, and that could hurt initial sales. YG is weird when it comes to P.R., but, if it was me, I'd only do that if I was going to - somehow - make it clear that BP was continuing, and let that sense of relief and happiness spill over on to excitement and support for BM. Plus, I'd expect BP to show a great deal of support for BM, and that wouldn't work if they were breaking up.
I have stuff to do, so I'll have to watch this a bit later, but it's good to see you being able to get back into the swing of things. I don't know what's on your list for YouTube, but the only thing that struck me was that Jennie put out a "jazz" version of You & Me, and it's my favorite version of the song. It's short, so maybe you could squeeze it in, but if not, that's fine.