these are the steps

step one: go on your computer go to elite.callofduty.com, sign in

step two: go to elite t.v, go to theater hover over or click select channel then hover over my theater click manage theater settings and now click unlink account from youtube and wait until the page refreshes dont click ne thing.

step three: go to your console and go to your vault and pick a short video so it can render, render the clip and wait until it uploads all the way until it brings you back to your vault.

step four: go to your computer refresh the page and go to your vault.

now your account should be unlinked from youtube, please thank the post if it worked for you