no reason we cant use “painting” words
triptych is much more expressive of the effect than “split screen”
i’d consider “Split screen” to be a bit under-parr to describe the effect in the video above.
if the effect is not much more than a simple repo that can be applied to every shot,
then yeah, copy & paste attributes is fine.
if you need to repo the shots within the frame, then that gets a little harder,
but basic principle of three tracks of video is the same.
you may have to lock the other tracks when you go to speed mod a clip.
nick