OK, I haven't seen the video, but as far as I can see, this is a free writeup that someone put on their Google Drive -- and you're calling that a "real" class? That's not even third party published - and commercial published works have classes ranging from the clown to the pest controller to the ghetto fighter and mouseburglar.
But I guess the point is to get all outraged that such a thing could appear anywhere.
Given that this "someone" got their original wheelchair added to official D&D, what makes you think they won't do the same with the update, including the Chronic Fatigue Barbarian? Especially since if they don't now, the SJWs will accuse the WoTC of bigotry?
If Thompson got her original combat wheelchair added to official D&D, then yes, I would be wrong. Can you give a link or reference that the original combat wheelchair was added to official D&D?
The wheelchair is in Candlekeep, and EVERY dungeon for official D&D from Candlekeep onwards has been wheelchair-accessible. Also, every D&D product from candlekeep onward has featured the wheelchair in art.
The official D&D online show/game Idle Champions of the Forgotten Realms has a paid employee they call a "player" acting out a PC in a combat wheelchair.
Incidentally Critical Role (which unlike ICFR is not official D&D, but is the biggest of all the Fake-online-game shows) has used the wheelchair too.
Strata Miniatures has made Combat wheelchair miniatures.
Sara Thompson, creator of the wheelchair, has appeared in multiple shows created by Wizards, where she was treated as the most important person in gaming ever, and was also a special guest panelist at D&D Celebration.
Every single establishment "game urinalist" website (polygon, nerdist, etc etc) made articles about how important the wheelchair is and how evil and completely misguided anyone who has the slightest doubt about the wheelchair must be.