Doc,
We were fishing B.C. king a few years ago, and the lodge provided these huge herring for bait. I tied up 100 leaders for the group with a hang-back hook for these large herring. We ran out of big bait, and the supply barge brought in a much smaller bait for the lodge. Hook-ups went way up with a longer hang-back, with the hook set you describe. Because of the bait or because of the hook???, but I tie all hang back now and the results have been good. With the bigger bait the hooks can be 16" apart. Might try more space based on your video.

Also, the teeth on those kings can raise hell on a leader. Outside-In-hookups relieve leader wear, the front hook often imbeds elsewhere during the fight, and if it helps the lost or released fish, "JUST DO IT!"