I have two videos I am working on.
Video 1 is straight forward its a normal video of my friends music band.
Video 2, is close ups filmed at the same time as video 1 of various members of the band.
What I am trying to do is at assorted synced places throughout video 1, to have black and white / greyscale clips from video 2, showing in behind the main video 1 like a ghosting in the background effect but not running full screen.
I'm at a loss as to how to obtain this effect, the synching is simple its getting the effect that is baffling me..