But do you really believe they were randomly playing Control - again - with all the other stuff they could be doing, and felt a smoother frame-rate ? because I suspect they were either doing commissioned work for Xbox to assess the improvement in the Xbox firmware, or they've been commissioned to do this to re-promote Control.
It sets a dangerous precedent for them and makes all their analysis opinion redundant beyond the 10mins after they do a video IMHO, as they are admitting that every game or game update they've ever tested - all the way back to the 360/PS3 gen - is unlikely to yield the results they pour pages of text nit picking on, because every time a new firmware arrives on a console, every game needs tested again.
Testing games at launch and after game updates tells the consumer something, to inform the quality of work by the developer. Selectively testing a game after a system update feels like a pointless endeavour as the next system update could just as easily alter that result, and creates a factorial to infinity level workload to provide gamers with accurate info about their game's current performance on their consoles.