This is actually the guy that finally helped me break through into understanding (at least a little what's going on). Specifically about how the movement through space lengthens distances between objects (including atoms) and causes information (including light) to travel further, along the hypotenuse of a triangle, "in order to do stuff".

"Doing stuff" includes observing things because of the light travel distance, but also biological processes, which involve eg. electrons moving from one atom to another.

I didn't watched the linked video here (more relevant perhaps), but this was the one for me: https://youtu.be/Vitf8YaVXhc