They talented guy singing in the video is William Singe. Known for being on the fourth season of The Xfactor Australia when he was just 19 ! He auditioned as a soloist but was then put into a four piece band called The Collective, however on 18th February 2015 he announced on Facebook he was leaving the band to pursue a solo career.
I really hope he blows up and wish him all the best !
Here's a link for his Youtube page, please subscribe like and comment.