That is wild, I love it! For running my DT-02 in the winter I made some ice spikes with some old bald tires and tacks, pressing them through the back of the tire and gluing them with epoxy. They worked well but after two seasons I've started losing some spikes.
The sawtooth grip seems to only give grip forwards, but the wire brush grips while turning too. Good video, I liked watching! (also, how good at english are you? I made this simpler to read because I don't know how you are reading this)
i'd say the Wire Brush length has acted like the sidewall of a tire during turning, and the wires themselves seem to have dug quite well piercing into the ice providing it plenty of grip but still slipping to get it moving.