I am assuming that if you have Direct TV you will not be able to get Sunday ticket on your Direct TV...that would defeat the purpose of their big bid for the Ticket
You will have to sign up for the ticket thru Youtube TV ....and then only have access to that while the season is ongoing. Not other Youtube channels.
On the other hand....local bars and restaurants WILL still be able to use their Direct TV for the Ticket as Youtube grandfathers them in and knows that they may not have streaming capabilities for 30 - 60 TVs
I think......