A documentary filmmaker who is resisting efforts by Chevron to subpoena outtakes of his film about environmental litigation against the oil giant in Ecuador will go before a federal appeals court on June 8 to make his case that the material is shielded by the journalist privilege.

Lawyers for filmmaker Joseph A. Berlinger as well as plaintiffs who sued Chevron over pollution and its effects on the health of indigenous peoples in Ecuador won a temporary stay Friday of a lower court’s order instructing compliance with subpoenas for some 600 hours of footage.