This video is made by Ahoy (quality content). And it's a fairly short video (around 10min) with an interesting conclusion. I highly suggest you watch it.
I see the dismissiveness as a reaction to the title clickbait/burying the lede. I get that this is how you have to do video titles on YouTube to get views, but a sentence or two about what the video's actual premise is in the post body would have gone a long way to interest people who are, understandably IMO, a bit apathetic towards headlines like this.
That was really good. It's something I hadn't given any thought to , but the fact that First Person Shooter didn't exist as a term when Doom released, it was interesting seeing the progression. I remember as a kid referring to Heretic and Hexen as Doom-clones, but wasn't really cognizant of the term as it fell out of use in favour of other descriptions.