Uses requiring access to the original (Score 3)

Here's one: A movie reviewer takes a look at a movie just out on DVD. During his time watching the DVD, he realizes that there is a horrible technical glitch, or some endemic glitch in the video transfer. In order to demonstrate the problem, he would need to use DVD quality video. If he cannot take a clip from the DVD, but instead has to film in on a VHS camcorder, the quality will go down even more, and thus distort his (legitimate) beef with the movie.