From an info page about the 1996 Doctor Who tv-movie:
Due to complicated licensing and ownership of the telefilm, no North American (a.k.a. Region 1) home video release has occurred in either VHS or DVD formats as of 2009, and no such release is expected in the foreseeable future. Ironically, several of the featurettes on the UK DVD were produced specifically for US audiences.
In fact, to compound the irony, the entire movie itself was specifically geared toward American audiences which, incidentally, was one of the reasons it wasnt as good as the recent BBC revival. Still, I imagine American Who fans would buy it if they were allowed to.