Wondering if anyone savvier than me can breakdown this video. Some things I notice: A 2-stage launch process: 1 to get out of the silo, a 2nd "main stage".

Wondering if anyone savvier than me can breakdown this video. Some things I notice: A 2-stage launch process: 1 to get out of the silo, a 2nd "main stage". The orange-tinged smoke, mainly in the first stage. Almost 0 acceleration between the first stage and main stage. (A bit nerve wracking!) We see some barrel-like metal object get shot out from the side at the start of the main stage. We also see multiple sealing (?) rings disengage from the fuselage in the start of the main stage.