Wider Wi-Fi channels can offer more capacity under suitable conditions, but they also occupy more radio spectrum. The largest available setting is not automatically the most reliable choice in a crowded building. Use the router's documented guidance.
Consider the band separately
The practical channel plan differs between frequency bands and regulatory regions. Avoid copying a width intended for another band or country. A setting that works in a detached home may behave differently among many neighbouring access points.
Use automatic management sensibly
A supported automatic mode can be a useful baseline. If you test a manual change, record the previous setting and compare the same viewing session. Changing width, channel and router position together makes the result difficult to interpret.
Measure where the player sits
A laptop beside the router does not represent a television through two walls. Compare stability at the actual location and normal busy time. Keep the setting only if its benefit is repeatable across the household's important devices.