I don't know if this has been mentioned anywhere in this thread. But I would like to add to the first post that the first Region2 dvd of Fantasia (released around 2000) contains the short edit of the film (same as the 1990 VHS) with all the original Deems Taylor voice over narration. And not the long version that was released overseas and where Deems Taylor was dubbed over, even on the segments of his narration that have survived.

I also got hold of a Chinese dvd of the film. This one surprisingly contains one full introduction, where we actually see Deems Taylor talking on screen. The rest is the same as the R2 dvd (voice over intros). I would suppose this is his actual voice that we are hearing.

The R2 dvd and blu ray that have come out in Europe since are the same as the US ones.