masking video how
Well actually, it IS exactly what you want! It all depends upon how you place the duplicate frames.
The only difference is that you don't layer the same duplicate frame a few frames back. What you do instead is duplicate the layer as I explained earlier, THEN, on the duplicate layer, move the action back a few frames so that it's happening earlier, THEN move that layer back until the earlier action is happening after the layer beneath it.
Repeat as required. It's a basic editing technique. All the Go Pro does is teach people not the think. It hasn't invented a new technique.