The available edition comes first
A television's maximum resolution is only one part of the picture. The viewing service must offer that title in the desired format, and the plan, device and connection must support it. Check the edition before assuming that a new film or an HD search label guarantees 4K.
1080p can be a sensible choice
A stable high-definition edition is often more enjoyable than a higher setting that repeatedly pauses. Compression and the original master also matter. Upscaling can adapt a source to a larger display without restoring detail that was never present in the supplied video.
Brightness and sound
High dynamic range, surround sound and other format labels depend on compatible equipment and the offered edition. Compare the actual player settings with your setup. If dialogue is difficult to hear, inspect the supported audio options rather than assuming resolution is responsible.
Where the settings live
Choose quality in the service playing the film. The BingeWatch poster and synopsis identify the production; they do not change an external player's video format. Use buffering help if the picture stops, or subtitle help when the issue is text or language.