Eric Whitacre's "October" + "Alleluia"

Headphones recommended
Firstly, I would like to state that none of the performances in the video or the music itself are my property, but instead were composed by Eric Whitacre.
If the point of the video is not clear, Eric Whitacre's "October" and his other work "Alleluia" are essentially the same piece, but arranged for a concert band and choir respectively. I have never seen the two played together, so I decided to make my own mix of what I imagine a performance from a choir and band playing these two pieces together would sound like. This was especially hard because during performance, tempo, and feel is largely up to the discretion of the conductor and soloists. The band arrangement clocked in at about 7 and half minutes, while the choir at about 9 and a half minutes. This meant dividing the tracks up into dozens of phrases, choosing which tempo I liked better for the given context, and adjusting tempos and dynamics accordingly. This was a lot of time and effort, but the credit really goes to Mr. Whitacre for his two amazing pieces of work.
The scenery and visuals were recorded in the Elder Scrolls V.