First of all, thanks for bringing this video to my attention again. Pretty sure this is the exact problem with my crappy ankle ROM problem. I have so much tightness in the area between where the achilles attaches to the calcaneus and the medial malleolus that my heel is being rotated up and inward. The tightness then continues up along the tibia to just below the knee. The result is my talus is getting wedged up and my cuboid is getting pushed out.