First, I'm curious about your flap setting on that landing. The nose seemd to be awfully high before the stall horn went off -- and I know it's a lot easier to skag the tail with flaps up than down (change in wing incidence angle reduces stalling pitch attitude for otherwise-same conditions).
Second, banging the tail is not something to be taken lightly. If you look at the back end of the plane, you'll see that the structure to which the tiedown ring is attached is not very substantial, and definitely not designed to take that much impact force. You may be shocked to find that repair to that area after a "little" tail strike can run ten hours or more of work including opening it up, removing the damaged parts, fabbing new sheet metal, installing, closing up, and writing up the 337 for this "major" repair. Further, the damage can be well hidden inside the skin. After a tail strike on landing (a "bang" like you heard on the video, not merely dragging the ring lightly after touchdown), an inspection by a qualified mechanic is essential for safety.