Hi Daniel.
Big thanks. It worked like a charm. Only that I actually just needed 3 layers: the (Luma keyed) clip, the (Alpha matted) 1st image and the (plain) 2nd image, in that very order from top to bottom.
When the clip makes ‘disappear’ the first image, the second image naturally appears beneath. 🙂
So, even simpler… but not for a newbie like me. Hopefully I’ll get to know better soon.
Have a nice day,
JC