We were there 9 days and not sure we turned on the TV. I did catch ESPN in the Sports bar so pretty sure it is available in room.
Alot of American channels. No uk ones apart from bbc world service
To be honest we don't really watch TV. We really don't spend a lot of waking time in the room. Even when we are back in the room for awhile between beach/pool time we spend it on the balcony enjoying the weather and view.
Get an answer from Excellence Playa Mujeres staff and past guests.