how do i cancel my youtube tv subscription

To cancel subscriptions bought fromiTunes, see this Apple document.

https://support.apple.com/en-us/HT202039

To cancel subs bought elsewhere you need contact the supplier.

If you subscribed through your iTunes account :View, change, or cancel your subscriptions - Apple Support

Look at the link I advised four posts above this one.

You might like to spend a few minutes reading this documment'

https://discussions.apple.com/docs/DOC-5951

Bcorong

I want to cancel my subscription to youtube TV

How do I cancel YouTube tv from my iPhone

Follow the instructions in the link posted in two of the above repleies on this thread