No idea, but you need to also consider YouTube's policy on circumvention of technological measures.
"Circumvention of Technological Measures
When we say circumvention of technological measures, we’re referring to tools that allow users to evade a software’s licensing protocol. This can mean serial numbers, keygens, passwords, and other methods to hack software or games."
A rom or an unauthorized emulator would definitely fit this description; and I myself would not risk it, as it could end you up with a terminated channel. I think this is a single-strike violation which if caught, terminates a channel instantly.