Without knowing what you have to start with, we can only give canned responses.
Reverb (adds layers)
EQ
Delay (adds layers)
Time/Pitch Shift (adds layers)
Panning

those would be starting points.
I assume 2:47 is an example of these layers (?)
You are on the right track; layers and timing of these layers (such as reverb delay, time delay etc) is important .. but so is EQ (before and after above effects).


I do not work here, but the benefits are still awesome
Make your sound your own!