https://m.youtube.com/watch?v=AP_NwitaquM
This is a short history of the origins and evolution of modern kendo as we know it. It is based on a comprehensive capture of its roots and the forces which shaped it over the past 400+ years with emphasis of its form in the late 19th and into the mid-20th century. Prof Alec Bennett is Kendo Kyoshi 7th Dan, and has a PhD in Budo History from Kyoto University.