Goode Water skis has it wired. They offer this option (dynamic heel lift) with their hard shell water ski bindings.
I skied with two conventional boots and felt too stiff and awkward with it (much like somebody on a skwal looks). So I have always skied with a rear toe plate for good attack balance. But this past season I modified my rear boot to allow my heal to rise several inches while skiing. Wham ! That is the hot setup.
So,,, the above video is not odd at all to me and I have often looked at Bomber Bindings and thought they are missing one thing: that tele heal lift (especially if you expect to ride a narrow virus or a skwal). But live and learn. Someday in the future it will be here.
"The GOODE PowerShellTM 5 Double Boot System features two hard boots on a single G-10 Composite plate, Boot Rotation System and adjustable rear double spring heel hold down system. The double spring system allows your rear foot heel to raise which adds Power to your edge change behind the boat. During a fall, both boots release on a single plate."