Song is "STINKY HAOWSE" by Bill Jobs
The two fights featured here occurred at the Polish promotion MMA-VIP. The first fight was Piotr ‘Mua Boy’ Lisowski who beat a lady named Ula Siekacz, who is nicknamed ‘ArmPowerGirl’. In the second fight, Michal Przybylowicz AKA "Polish Ken" beat Wiktoria Domżalska.
These are not the first intergender MMA matches, but they might just be the hardest to watch