sometimes the editor can't see it because they're focusing on scenes and lyrics and stuff. Basically they're clouded when it comes to flow. (that's what happens when I'm editing, then after i haven't watched the amv in a while, i watch it and i feel the flow) The viewer however is watching the video not knowing what scene will come up next, so they can feel for flow better than the editor can.
I really hope that makes sense

'cause trust me, i know how you feel.