Will there ever be a machine that can send you into a TV show or movie on a DVD?

Answer 1

Predicting the future, possibly... But that's far from now.

If you are talking about being physically sent into a TV/Movie, then you would be discussing something very similar to Star Trek's "holodeck". Such a technology is certainly possible according to to our current understanding of the laws of physics, but from a technological standpoint, would required a level of technology and engineering far, far, beyond that of the current day. The holodeck technology of Star Trek is set in the 2400s (25th century), which, frankly, I think is a bit optimistic for development of such an item.

If you are talking about projecting your mind into such a TV/Movie, that's more of what we currently call "Virtual Reality". It is currently possible (using special headsets and clothing) to provide a crude version of feeling like you are in a virtual world. This is progressing rapidly, and I would expect that within a century (or two, at most), a person would be able to sit inside some device (or wear some special items), that would create a simulation of what it would feel like to actually be in some virtual world. That is, I would expect high-quality Virtual Reality to exist no later than 2200. In fact the biggest problem with VR is not creating the simulation experience (that is, not in creating the world), but in realistically simulating human beings inside that world. Having multiple people inside a VR would be easy, but having a computer realistically control (and act like) a human is likely far, far, away, if not impossible.