To make it easier, here's a list of the demoed voices, and where you can find them in the video:

Seattle Sections: 59 seconds

Solo Cello: 1:41

Strings & Brass: 2:12

Orchestral Horns: 2:45

French Horn Swell: 3:55

Pop Brass: 4:12

Horns Accent: 4:21

More Strings: 4:31

Pizzicato: 5:01

Harp: 5:08

Woodwinds: 5:25

Oboe: 5:39

Clarinet: 5:51

Latin Flute: 6:09

Tenor Sax: 6:40

Soprano Sax: 6:58

Choir, Strings, Pipe Organ (together): 7:42

Choir: 8:13