I have no idea about the copyright issues here (someone let me know if they are illegal), but the Ridley librarian has kindly pointed me towards two films about the Book of Revelation that are available on you.tube.
Apocalypse (2002) staring Richard Harris. The film is set in 90 AD and concerns Jesus Christ’s last surviving disciple, John of Patmos, and his writings and visions of the Apocalypse. Emperor Domitian has declared himself to be God and ruler over heaven and earth. The Christians do not recognize his divinity and face persecution from the Emperor.
Saint John in Exile (1986) staring Dean Jones. A one man play where Jones performs most of the content of Revelation as dictated to his secretary Theophilus.