Pretty much this, yeah. She's wearing the pasties because that top would look wonky with a regular bra. She probably doesn't want people being creeps if her nips poke through the fabric. As far as not noticing - you stop paying attention to yourself when you're on camera for hours at a time unless you're doing something where you want to pay attention to your specific actions. She looked like she just came back and was paying attention to setting up the game. I really don't think it's any deeper than what it looks like on the surface.