MTurk has already been used to classify and tag videos. I spent a month as Turker (as an experiment) a few years ago. The best paying HITs were provided by a

MTurk has already been used to classify and tag videos. I spent a month as Turker (as an experiment) a few years ago. The best paying HITs were provided by a porn company to classify and tag their videos. You were given a sequence of images from the video presumably to save bandwith. I even debated scripting a helper tool which would take a few keystrokes (for example dvda) and generate a suitable description.