Sounds interesting, I'll take a look in the evening. I was thinking of a system which would analyze for example areas of 8*8 tiles, and give them values like 0=easily passable ... 5=blocked, so then the A* wouldn't need to scan everything tile by tile, as it could navigate that pre-calculated grid of 8*8 blocks, going into details only when needed. So, it will be interesting to see if that video has some other ideas which are new for me.

Right now I'm having a short break to warm my fingers, after skinning and butchering a ram outdoors.