Anatomy scan rules

Does your OB's office have rules for your anatomy scan?

Mine actually does.

Drink 24 oz of water an hour before appointment time and hold it ( that makes sense)

Only 1 guest allowed at the anatomy scan.

( ok makes sense) maybe it's a small room 🤷‍♀️

No cell phone use, pictures or video is allowed to be taken. Images will be given to you after the scan.

This i don't get, because i see a lot of people posting videos of their babys ultrasound at their scan.