I've heard this effect on bass in a few different songs. Mostly groovy RnB and some older gospel tunes. I have no idea what it is but it sounds so smooth. On the video the bass comes in at the 0:50 mark and there's a lick at 3:35 that you can really hear it. Take a listen and tell me if you know what it is! Virtue~ Angels Watching Over Me - YouTube Thanks!