First off the CGBros are collectiing and uploading other peoples work from around the world. And its not their own work but others animations. It is very clearly written on their youtube home page.
This short movie is really badass and well made. I'm interested in seeing this in work for a game or even a longer movie. I rate only a 4 star because I would want something more of why this is happening. But its a teaser so still really pleased what you pulled of!
reading commentaries really helps...
Stolen work from CGBros off YouTube. Whoever uploaded this deserves no credit.
https://www.youtube.com/watch?v=dDLog0Vqpo4 ... U arent Unity3D original creator. Agree with @Mounce ..