I have trainers whom I monitor on my account. Besides scheduling a Virtual PT session, there's no way to know if the trainer actually trained his/her client. How do I know if a trainer did a 60 minute PT session or just signed on for 5 minutes and then left? There's no time stamp or time duration.

When you program/schedule workouts for a client, there is a time stamp the moment they press 'Start Workout' & 'End Workout'. There should be one for Video Calls as well so Master Coaches can see whether or not their trainers are actually conducting Virtual PT sessions.