Joining a New Yarn in the Round

How to join a new yarn in the round for an afterthought sock heel. Featured in this Video Pattern: Feeling Loopy Socks - https://shop.thechillydog.com/product... Yarn: Schoppel Zauberball Crazy Needles: skacel by addi Turbo Rockets #FeelingLoopySocks #TheChillyDog