Nobody special. I don't visit ModDB too much anymore but I am sometimes on.
All you need to know about the video itself is that it is a top ten's list for most horrible deaths. Number 3 on the list turns out to be "Fucked by a horse". It doesn't take a rocket scientist to figure out where this one is going if you've already seen my previous uploads here.
However, where this one differs is that the brony in this one literally didn't have to say ANYTHING. Everything here is implied directly from his avatar and people's personal thoughts on bronies. His avatar was all these people needed to already start assuming he meant that he wanted to fuck a horse. In fact, go ahead and imagine it without the pony avatar and the meaning is left completely ambiguous.
Now, I'm actually not set off by the first dude here even though I don't like when people bring up bronies. It's the faggot with the anime avatar at the bottom's hilariously hypocritical comment calling him autistic is what made me giggle like a little schoolgirl.