It's not a bad video, and he does make a point, but being a person that never watched Citizen Kane (although I do understand some of the references and the impact it had on film), I can't fully understand how he thinks Metroid Prime is doing wonders for gaming.
Case in Point: Who the hell has used Metroid Prime - or even Metroid as a whole series - as a basis for their game over and over? Who looks to Metroid as an astounding accomplishment in gaming? Yes, it pretty much paved the way for armor-clad heroes, however, don't believe for a minute that I'm "dissing" Metroid in any way. I absolutely love Metroid, and it's in my top 5 of favorite series.
Making the outlandish claim that Metroid Prime is the Citizen Kane of gaming? Metroid Prime is an example of phenomenal game balance, control mapping and fluidity, as well as sucking you into the atmosphere of the multiple worlds you'll be visited across the trilogy (Tallon IV, Aether, Bryyo, etc). Retro did an excellent job of creating Metroid Prime as a trilogy (although I feel they slacked a bit with Echoes) and they know it.
But has it impacted gaming like Kane did for films? I have yet to see such impact.
Source • ABC News: Nintendo's Video Game Masterpiece