Plan for the number of screens you use together
Count simultaneous viewers before counting devices. Two TVs used at different times have a different requirement from two programmes playing together.

Write down a normal evening
List the rooms in use, the time and the programmes. If two screens are on together, ask what account arrangement the service supports. TellyPal’s listed plans cover one account with one device playing at a time.
Test the busier pattern on broadband
A stream in the sitting room may play well while the other screens are off. Test the arrangement you actually expect to use, including ordinary downloads and video calls. Compare the total cost of the accounts you need, rather than assuming the first price covers every room.