This arrangement is probably one of Diane Bish's own. In my library I have two arrangements, one from Robert Wallace, II published by AK Brass Press and the other from Donald Rotermund published by MorningStar. Of the two arrangements, I prefer the Rotermund and it matches fairly closely to the video.
I have admired this composition ever since I first heard it in the 1970s on the Columbia LP "Music for Organ, Brass, and Percussion" with E. Power Biggs and the Columbia Brass and Percussion Ensemble. A marvelous recording!
As OrganistRob320 mentioned, the arrangement by Donald Rotermund (key of C) for brass quartet or quintet, cymbals, and timpani is a great arrangement, and is the one that I've used a number of times: http://www.morningstarmusic.com/viewitem.cfm/item_id/20-741
An internet search also surfaced arrangements by Daniel Leavitt, William Picher, Rick Grassler, and Warren Wernick. I'm not sure if all these are still in print.
It could be one of her own arrangements since she frequently writes and publishes her own sheet music and albums. Have you checked her site? I play the piece, but only use the organ score.
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