Jitsu Videos

I was intrigued to find out what particular context the Jitsu videos were created in. For instance were they filmed as an advertisement, as individuals showing off their skills, as a training guide or as someone recording a competition taking place etc ?
In order to obtain a precise answer, would be an extremely hard process, simply because of the vast amount of footage to look through. On that note I will search and display some of the wide variations of footage that appealed to me.