Halo NightFall armor

My Friend recently invited me to an little odst clan, he said to get the halo NightFall armor from halo Chanel, I went to go watch halo NightFall and it would not let me watch my friend said it was free plus I have gamepass ultimate so that I could get mcc and I heard mcc comes with NightFall how come I can’t watch it and get the armor???