Found these vids. interesting.
I figured I would post here and see what others thought of them.

Set of 3 vids. all about 10 min.

1 of 3 https://www.youtube.com/watch?v=CPl8JNxSYIY

2 of 3 https://www.youtube.com/watch?v=BhoVL96BjP8

3 of 3 https://www.youtube.com/watch?v=tYdX5IP7lOE