What species is this "talking" bird?
It is a black-collared starling (Gracupica nigricollis). 

According to the title of this other video, which is the same footage uploaded by another user and could be the original one, it has been recorded in Thailand, where the black-collared starling is common. 

Also, from the same Wikipedia page:


  In Thailand the collared starling is sometimes kept in captivity and taught to speak.