Watched the video, here's my thoughts:
-The term "true gamer" just seems silly, especially in 2019 where gaming is more mainstream nowadays. Sure, there's obviously people more passionate about video games than others, and there are a few cases of people who take gaming too far, but I feel like being a "true gamer" just cause your preferences fall under what is considered correct to be gaming "optimally" or whatever comes off as silly. Are you someone who studies frame data to be the best at fighting games? Cool. Do you prefer just playing old SNES games on your perfectly functioning old CRT TV? Cool. Do you spend hundreds of dollars on powerful graphic cards and a 4K monitor to get the best resolution and performance out of your games? Cool. Do you prefer games on portables cause they're more convenient for your life? Cool.
-Obviously, gameplay is more important than graphics, but I feel it's not a simple case. I don't think just using Blaster Master Zero is a good example cause you seem to imply using 2D sprites automatically means bad. If anything it's easier to make a modern 3D game look worse than a 2D game cause there's much more that goes into things like lighting, colors, model quality, and texture quality that are important in making a 3D game look as best as it can be; I know a lot of people who will say that SNES games aged better than N64 games overall in terms of looks for example, cause SNES perfected how 2D games look, while N64 represents an early phase of 3D gaming. Even retro games can look bad if the sprite quality and color usage is off; Ghost N. Goblins looks uglier than Super Mario Bros. Graphics is also important in games like action games and fighting games, as they are able to help express they archetype and playstyle of certain characters using looks alone, and extra animations and visual effects are very helpful for giving cues that more technical players can utilize for optimizing gameplay. Obviously not every player has to use these cues, and are generally not required for just beating a single player game, but the fact they're present helps.
-Frame rate is generally genre dependent I feel. 60 FPS is most crucial in fighting games and action games in order to ensure gameplay that feels responsive and flows well, otherwise I'm not too sensitive about it, especially in turn based RPGs.
-Eh, just cause you own a Nintendo system, doesn't automatically mean anything. Nintendo obviously has top tier games, and 99% people who buy a Nintendo system buy it for the great exclusives, but consoles like PS4 has great exclusives as well, and PC has a plethora of games, and even though those systems have better specs, not everyone cares about great graphics, to use your own example, Blaster Master Zero is on PC and PS4, among a plethora of great indie games, which I know are popular such as Hollow Knight.
-I agree with the last point fully, idc what platform the game is on, as long as it's good I'll play and enjoy it; I primarily play games on Switch nowadays, but my favorite game of all time is Persona 5, which is a PS4 exclusive, so ye.
I probably said something stupid or refutable but das my stance.