My wife and I saw this IMAX movie back in 1998 when it debuted on the IMAX screens. You lose a bit of the impact seeing it just on a TV, although I get the feeling that it will look pretty awesome on an HDTV.
Anyway, the IMAX film follows an elephant clan through one season, having to weather drought, etc. There's a heartbreaking scene where the clan comes across another female elephant whose calf has died.
But the real reason to get this DVD is for the "Making of" documentary. This is fascinating! It's chock full of details about IMAX, like the fact that one single frame of an IMAX film is the equivalent of two 70 mm frames put together; it's got about **ten** times the level of detail that a 35 mm frame has. Not only that, the documentary shows how they got the elephants used to their presence so that they could film them. It explains how the sound that you hear isn't actually contemporaneous with the picture, because the IMAX camera is so loud it would drown out a lot of ambient sound.