https://youtu.be/MFGM8cIzmjA
Looking at the video linked above, all appears to be going okay until the aircraft falls out of a stall turn left with a bit of a tailslide (at about 4:20). S&L flight is regained now flying downwind (ie left to right) but the engine does sound abnormal. The engine then stops and, after a pause, the right wing drops aggressively and the nose lowers as a turn into wind is attempted. It could almost gave gone incipient before recovering just prior to impact with the wings almost level but the nose still low.