Didnt look into this in detail. Just saw the video. Saw the huge stacks of addon boxes. Saw the "its premium emulation" business model. Saw the youtuber that purchased one, because its "this good emulation". Saw him being pseudo critical of the Genesis emualtion, in an age where literally everyone could use Genesis Plus GX on a 25 USD device with two good controllers bundled in, and be happy with the results, saw them using custom crafted coverart - probably without a license. And had enough.
Everything about this screams "Could I interest you in a HiFi speaker system?" Business model. Targeting people that are not the brightest, but have disposable income. The youtuber marketing comes for free.
Still can be wrong, but where? But how? They licensed emulation, so they could sell it? Most of it is free to use for non commercial use. Not saying that its always supposed to be that way - bus saying, that its another "I bet we could make this work as a business model" out of something that is free as in GNU.
And because you want to sell it at a larger price point - better make those addon plastic boxes huge. And black.