Ah, I see now. Did a bit of research (and now I'm compiling a list of world instruments. Lol) and found that _the cello-like instruments being played at __2:15__ are called _*_de-gehu,_*_ equivalent to the role of a cello in an orchestra, and related to the gaohu, erhu, zhonghu and bass gehu - basically, a particular family of huqin (bowed) instruments._