I'm getting the feeling that you want a test of the internet connection or something like that by your standard of what a fair test is. I don't think that's what they're going for, but a more holistic "typical usecase" test. That said I haven't bothered to check the video for exactly how the test is setup maybe someone will comment with that info.
they should be comparing the same input/output hardware with the xbox
then only switching out the xbox for a PC connected to the same inputs/output
what would be terrible: comparing xbox plugged into TV+controller with geforce now running on a PC with keyboard+mouse+PC monitor
the numbers don't make sense otherwise