Sorry I am late on this thread. As someone who studies and teaches Shorin Ryu Matsumura I had to comment. The kata that Soken sensei is doing in the "Life of a Grandmaster" video is our version of Hakutsuru or white crane.
Yes there seems to be many White Crane people popping out of the woodwork every day. Most can be traced back to China somehow and even less can be directly linked to Soken sensei's art. Actually there are a lot of white crane concepts in many of our kata by way of Soken sensei.
Imperial Crane Martial Arts