I have made several movies in the past with nature video in line 1 and music video on line 2.
I got an excellent result by (in places) fading 1 video over another for anything up to a minute so you could see both nature and singer at the same time. Previously I used a window which had a slider from 1-100, by moving it half way it produced the effect.
I've tried clicking every combination Modify etc etc and can not get that window to show up. Just can't remember how I did it
Any suggestions appreciated
Thank you
Rob