My quote is not the only content of the video; I've just included most of the introduction. The 13:23 long video has the following chapter markers:
00:00 Introduction
00:50 How was DOOM originally described?
02:20 DOOM clones
04:33 Quake Killers
6:06 A hypothetical question
12:05 Conclusion
Only the first half of the video is accurately described by your suggested title. The video as a whole is described by the existing title with reasonable accuracy. It's not a bait-and-switch: the video also discusses what genre DOOM is, not only what genre DOOM was.
It seems that you (and many others) have used a heuristic of "clickbait-y sounding titles don't accurately describe the contents of videos" and left corresponding comments. Although often accurate, that heuristic has failed in this instance.