Basically, the rundown of the video is that it follows the typical format of him being on the verge of outright yelling through most of it, him talking about how the SJWs/Antifa of the fandom were always calling him a nazi and a bigot and such, and how they started calling him an "AltFurry" out of the blue (when he wasn't part of the group at the time), with AltFurry people, though none are mentioned by name but I'm sure we know who they are, even telling him, "Yeah, you're an AltFurry".
So he goes into how this was all a big "What the fuck even" for him, how leftist furries were calling THEM all bigots and nazis, and so he wanted to go figure it all out, so he did. He then spends several minutes defending AltFurry as being a group of outcasts within a group of misfits, which the leftists have denigrated and pushed aside from the fandom proper, and how unlike the leftists, they're a group of all kinds of good, decent people all talking, discussing, having fun, etc.
In a nutshell, though, it's a video of him naively defending and praising AltFurry because he's so late to the game and never saw or experienced their nonsense before.