GDPR states, that even if you give consent now you can withdraw this consent anytime. So even if OP consents now and in one year decides he/she doesn't want the

GDPR states, that even if you give consent now you can withdraw this consent anytime. So even if OP consents now and in one year decides he/she doesn't want the daughter's videos being used anymore he/she can do this and the school needs to honor that (or else: big fines). So GDPR helps you in maintaining control over your data as you see fit.