Can we all collectively find a way to authenticate videos as they are recorded? Official videos are “easy”: store the hash and length in a public blockchain. Gi

Can we all collectively find a way to authenticate videos as they are recorded? Official videos are “easy”: store the hash and length in a public blockchain. Gives it a verified timestamp as well as being “signed” by the official wallet. Then videos can be hashed later to verify that it’s untouched. But, security cameras?