Well, everyone is entitled to their opinion but there are a few pretty strong arguments that speak for it being actually him.
- He's officially partnered with the Server, whose TS he joined.
- One of the owners of the server was in the channel and he personally messaged him and told him how to get Teamspeak and...well I'm pretty sure he legit has him on Skype since they are business partners.
- Every admin of the server was in the Channel as well and they were all super excited as well to actually get to talk to him... and honestly I don't think they are good enough actors to pull that off.
- Lastly, he promised to comment on XNexer's video when it's up and when he does that, I'm pretty sure it'll convince the last one of the "non-believers"
Anyways... those are a few reasons...