Very good video. I completely agree. I like the solution of the arm gradient.
I'm using Hype to make whiteboard videos and it's much more flexible than the trendy programs with pre-made templates. Yes, it's faster if you use their models, but for more personalized videos the best option I have found has been Hype.
I still have to finish mine, it's a personal project about a university job and I'm doing it in my spare time.
When I have finished it I will show the result.