Ha I have almost the exactly same video, although not of the same good quality you have here.
The pilot stood the plane up on one wing tip in a tight turn directly over Moffett Field while I was standing with my head out the top. Fantastic.
I went back to the field the next day just to watch the B17 for a while.
There were another round of flights and just before the first people started to board, cancelled for the day. Some pump failed.
It seemed to have sat for a week before they got the plane fixed.