You want regular sidestroke then. It's not that easy finding a video because they are all about combat sidestroke. Because tacticool?Not the whole thing, just the bit about turning the lower torso a bit to the side if swimming on front so that fins can catch the water better.
Anyway, back when I was a lifeguard, sidestroke was the standard stroke for towing victims. It's a nice stroke because it keeps positive contact and you can keep an eye on the victim and talk to them and make quick checks to see where you are going. We used a scissors kick, but with fins I'm pretty sure a flutter kick would be more efficient.
Like this. I'm not sure if the arm pull would be helpful in scuba gear.