Hey all, I'm Scott, from the UK, Judoka (1st dan as of July 2014) and Kickboxer (though I've let that fall by the wayside, I need to get back!), this is my side blog, main one being galavantmedic. Welcome to JudoAndBudo!
A man demonstrating use of a 锤子/chuizi (hammer/mace). In the first half of the video he is wearing 飞鱼服/feiyufu (flying fish uniform), a type of hanfu originating in the Ming dynasty. At the end of the video he is wearing armor.
According the op, the chuizi weighs 8 jin (~4kg; ~8.8lb) and the armor weighs 38 jin (~19kg; ~41.9lb)