The exclusive content would need to be drop-dead amazing, and be from YouTubers I'm genuinely interested in watching. I don't know the full story, but from what I have seen, it looks like Netflix, with a few added features. It also seems to have an Apple Music vibe about it - you pay this much every month, and royalties are divided amongst those whose content you see.
If I had the money and was sure that the creators weren't getting royally buggered over by it all, I'd probably subscribe, yeah.