This does sound a load of tosh. I assume that crew members do not get undressed when using the rest areas for starters, and 16 minutes without anyone banging on the cockpit door?

However watching the safety video for the 10th time that month wont help. It lacks important information (which row the emergency exits are in for example), and is full of mindless crap about bunnies and hand baggage.

Unfortunatly other passengers will inflate their life jacket while in the aircraft. You just have to deal with that.