This video is about the Behringer 1033 dual envelope generator, which is part of the Arp 2500 series. Also explains some basics about envelopes and their different forms.
0:00 intro
1:25 basics of envelopes
4:14 module outline
4:46 a few sounds w/ manual gate
6:12 outputs
6:46 external gate input
7:46 trigger input & multiple mode
10:00 quality & thoughts
10:52 demo #1: 1033 modulates two VCFs
12:53 demo #2: 1033 w/ SQ1
13:38 demo #3: 1033 modulates VCF & ModAmp
14:31 demo #4: 1033 modulates VCF, gate from lfo
15:10 outro

Scope from the video is a VPME ZeroScope.

Thanks for watching and stay tuned!