According to the European Data Protection Board, data subjects should be aware of any video...

The shop operator should post a copy of the manual of the video surveillance system in the shop and on its social media channels.

The shop operator should provide full notice of the intended video surveillance outside the shop, for example with a sign or a stand-up display.

The shop operator should instruct the data protection officer to hand out a comprehensive notice to data subjects every time they enter the shop.

The shop operator should provide the most important information on a clearly readable warning sign to data subjects before they enter the monitored area, and additional mandatory details by other means.