It doesn’t sound like BZ dub, particularly with all the voice doubling. Also, this won’t necessarily be the dub that gets released in the US… Japanese companies often commission promo dubs to help sell their shows internationally.
(I’m the original poster of these clips… seems I’ve finally got the attention of people who might be able to identify them).
I feel like I might be able to get to the bottom of this now.
My best guess at the moment is that it’s a promo requested by Toei and made by some LA recording studio of ep 1. They must have replaced the music for either liscensing reasons or maybe simply because the LA studio never got the original tracks from Toei.