1. I have no doubt to authenticity of the latest video. It answers a couple of my questions.
2. At heightened alert readiness I have no doubt that missile battery could be in autonomous mode. ie no need to obtain further launch approval if engagement criteria are met. Don't confuse AUTONOMOUS with AUTOMATIC.
3. I do however doubt the order to engage anything coming from S or SE. Why engage targets coming from within your own airspace and why were earlier ac not targeted. More likely instructed to engage tracks on a S or SE TRACK. ie entering your airspace.