Pregnancy belly bands and waist trainers: Good or bad?

There are many questions that come with belly bands/waist trainers during and after pregnancy:
-Will they make my waist smaller?
-How long should I wear it?
-Will it prevent/heal diastasis recti?
-Will it cause prolapse?

For this reason, I (a pelvic health physical therapist) have put together this short video to share my thoughts.