The nightfall on halo channel is saying i have to pay for it but my cousin said he got it for free im confused 
he watched it for free about a year ago i was trying to get the aurmor (odst) for halo 5 thats why i pit it in halo 5 .thank you and have a great day if this could get fixed that would be nice
Halo MCC usually includes a redeem code that gives you free access to Halo Nightfall. If you don’t own a copy of MCC you have to buy Nightfall separately.
You can get the armour from REQ packs in Halo 5, so if the only reason you want to watch Nightfall is for that then you can save yourself a few bucks. Just keep unlocking Silver / Gold packs and you’ll get it.