I found that Veterans for Peace introduced a TV documentary of Okinawa about former US soldiers rising up against the U.S. base construction at Okinawa on their site.
Most of the interview scenes are spoken in English, so it is worth watching for the audience in the United States. Here is a roughly translated script with time stamps (though it needs a lot of correction ;-(). Hope it helps you until an official English subtitle would be released!
テロリストは僕だった～基地建設反対に立ち上がる... por tvpicup2016