Movement Daily with Kaizen Taki has released a Systema Common Thread Series Video Course. The complete course includes in depth lessons from a 2012 workshop with Kaizen Taki. This workshop offers detailed drill progressions, principle theory, plus clear explanations of how the same principles apply to Massage, Hand-to-Hand, Strikes, and Weapons Use.
This is awesome! I participated in the original workshop (that me in the photo all locked up) and can tell you the content and the teaching are exceptional. Here are deep principals of Systema explored through a variety of exercises and applications. Highly recommended!