Inkigayo Performance (with Sunggyu, Sungjong and Woohyun)
Music Core Performance (with Hoya and Dongwoo as back-up dancers)
Source: 1, 2, 3, 4.
The MV is rather old and has been posted before along with the performances, but the BTS hasn't, and since Infinite is now an established group, their appearance warrants something more than an afterthought mention I think. And of course, Epik High is never a redundant thing to talk about.
Everyone (expect Sungyeol) appears for the MV/performance at one point.