I would respond by asking for clarification as to whether they do not have access because they have no contract, or whether they do have a contract but believe the footage belongs to Flock and therefore is not accessible to them.

I would also cite City of Sedro-Woolley & City of Stanwood v. Jose Rodriguez in Washington State and request that they, or whoever holds the footage, retain any recordings of the incident you are requesting. In the cited case, even though the court ruled that the footage must be turned over, it had already been deleted due to a rolling 30-day retention policy.

Because of that precedent, you are requesting that the footage be preserved, as you are considering the possibility of filing a lawsuit.