It's Herobrine - Song And Video As A Tribute To Herobrine.

I Drink With The Dead

JT Machinima 
https://www.youtube.com/user/skullkruncher13

JT Machinima iTunes
https://itunes.apple.com/us/artist/j.t.-machinima/id302108325

This is a cover of Neebs Gaming Intro Theme.