A remix is an alternative version of a recorded song, made from an original version.
In this video, DJ AM (aka Adam Goldstein) remixes “Wonderwall” by Oasis.
Dubstep, simply, is techno that is centered around bass.
(I picked this particular sample because I think everyone should see Marquese Scott dance.)
Turntablism the art of using one or more turntables,
combined with one or more mixers to create an original musical piece.