Looks like a good hip-hinge you got there. Most of the time my glutes are less sore than my hams - sometimes it takes either heavier swinging or higher volume for me to wake up with a sore ass! I am a novice teaching myself kettlebells and to my eye you have some of the same problems I have with my swing. Your knees are "rebounding" - locking and then slightly unlocking at the top of your swing. You can fix this with heavy kb deadlifting - it helped me a ton with this. Your shoulders are also rounded forward slightly which I think is asking for the front of the body to take over some work which is maybe why you are not getting a full perinnial chain activation ( i think I got that right - fancy way to say back of the body). Take more time on your hike position because your shoulders do not look properly packed from the get go. When I get in the hike position I think to myself, "head over hips, hips over knees, firm waist, shoulders down and back, lift the chest."
good luck!