A nearby 5 GHz access point often offers useful capacity, while 2.4 GHz may remain reachable through a more difficult layout. The better choice is the band that delivers a stable connection at the player's actual location.
Account for the room
Walls, cabinets and the television itself can weaken a signal. Test with the player positioned as it will be used, rather than measuring in the corridor beside the router. A band that wins there may perform differently behind the screen.
Avoid a blanket rule
Distance is only part of the picture. Neighbouring networks and connected devices also share radio space. Compare a normal viewing session on each available band, using the router's supported controls and recording the result before keeping a change.
Keep network management simple
Many routers steer devices between bands under one network name. Follow the manufacturer's guidance before separating names or disabling bands. An arrangement that helps one player can inconvenience other devices, so retain a way to restore the original configuration.