Tried changing to superfast (still 720p60) and it works pretty fine. :shrug:
EDIT: Also, I'm playing SWBF2, which depends a bit more on 60FPS.
EDIT 2: I'll try 30FPS, and see how it works out.
EDIT 3: Oh, actually looks ok with 30FPS, do you think I could try 864p30?
EDIT 4: Tested it out, 864p30 with superfast looks fine while streaming, thanks for the helpful frames advice. I was looking into other methods as I wasn't willing to sacrifice 720+p.