A normal Tuesday evening and a houseful of visiting relatives put very different loads on an IPTV setup. The connection count that comfortably covers your usual household can run short the moment a few extra devices join in across several rooms at once, which is worth checking before the day itself rather than mid-gathering.
Count the realistic peak, not the average
Think through the actual worst hour of the gathering — grandparents watching one channel in the living room, cousins streaming something else on a tablet upstairs, and someone checking a score in the kitchen — and make sure your connection count covers that peak specifically, even if it is higher than what the household needs on an ordinary day.
Decide the main-room content in advance
Mixed-age gatherings go more smoothly when someone has already thought about what will be on in the main room rather than handing the remote over cold. A family movie works well as a default for a mixed-age group — see setting up a proper family movie night for picking something that suits grandparents and children in the same room without anyone feeling left out.
Sports on in the background
If the gathering overlaps with a game that part of the family wants on, a second screen showing sport while the main room does something else avoids the usual tug-of-war over the one television. See seasonal sports content for family viewing for making that work without it taking over the whole gathering.
After the relatives leave
If you added a temporary connection or tier just for the holiday, note the date to downgrade it back once the gathering is over, so the household is not paying for peak-day capacity for the rest of the year.