I don't think he lied. He simply said that people love him now. On his twitter account he says that he's doing alright now but that doesn't mean that the whole thing was fake. It happened 4 months ago afterall. So yeah...maybe he was acting a bit conceited in his second video but I imagine becoming so popular so fast can do that. He's just a kid anyway
And even if it was fake , which I don't believe, there is a real message behind it. And this video might help other kids who get bullied. I mean just look at how much awareness it reached in just a few days ;P