"...But there is a convergence between this and the blending mode. And it will be confusing to have two completely different tool serving the same purpose.
This will need to be thought over to see what can be done.
Maybe when the "aligned merge" function is in place the blending mode can be removed completely, and the image tool enhanced to allow for "Send video to the other screen", where instead of overlaying the video on top of the other at 50% opacity, we put it in a small - resizable insert. (In that case you'd have to keep both screens open)…"
Actually there is a "coaching" difference between a picture sequence on top of a video or a combined video. As a coach I try to investigate a certain pose (single frame) of a performance, at the same time both comparing it to another picture and looking for reason/solutions in a sequence that lead to this particular move. It is like looking at a freeze and moving picture at the same time...My head fills out the lacking frames