I doubt they need your consent and even if they did, you have no damages.

This sounds like either:
a.) The plot of a bad porno
b.) The plot of a bad B movie

As others have said, if you're in public you have no expectations of privacy and people can legally film or take pictures.

Unfortunately this has been an issue from the first day cameras were on phones.

Was your boss concerned about your hair? If not, there's no harm done. If he/she was then you should deal with that issue. Either way forget about the customer.

I mean they didn't post the video publicly from what you've said, and only showed it to theal manager. So you don't have much of an argument there.

Had you just shoved someone in the oven? Maybe they were filming that?

you don't have a case

😡

Well, it's kind of disgusting for you to be picking at your hair in the food prep area. Plus, it's illegal.

Consent for what? You are in public.