This chapter shows that medium specificity distinctions have always been important for the theorization of media artifacts as new technologies emerged enabling different media forms to exist. It presents remix in relation to other intertextual forms and also to subdivide remix video according to the various sub-genres currently circulating online, in the development of a working taxonomy of remix video. When photography began to emerge as a media form in the early 1800s, its potential for artistic expression was widely misunderstood and it struggled to gain legitimacy within the fine art establishment. New media has resulted in the breaking down of traditional boundaries that separated various media forms in the past. Successfully experiencing online video requires a different set of media skills than those required for consuming television or video, its closest cousins. Remix video certainly predates transmedia storytelling, and arguably we have yet to see any masterpieces of the form emerge.