I also find that for a first time user, it may be a bit hard to figure out what's exactly going on. I experimented with slowing down the animation after every step, let the user take in what's happened and then move to next step but that made the video too long and kinda boring for experienced users

I figured after watching 1-2 such visualizations, you get used to looking at exactly the parts that are changing and then it works without explicitly slowing down the video