Twenty-five frames per second fits evenly into a 50Hz refresh, with each source frame repeated twice. It does not fit evenly into 60Hz without timing conversion. Matching supported output timing can therefore improve cadence for some television material without changing its actual source detail.
Identify the source first
A programme associated with one country is not proof of a particular frame rate. Production, distribution and conversion can differ. Use playback information if the player exposes it, and distinguish 25 complete frames from 50 progressive frames or interlaced field-based material before selecting an output mode.
Test movement and menus separately
A menu may feel more responsive at one output setting while the programme moves more naturally at another. Judge the video with a horizontal camera pan, scrolling credits or a moving scoreboard. If automatic matching works reliably, it can avoid choosing one fixed timing for every kind of content.
Leave a compatible fallback
Some displays or connections do not accept every timing mode at every resolution. If the picture disappears, let the device’s confirmation timeout restore the prior mode. Do not approve an unreadable setting. Document the working resolution and refresh combination so another household member can recover it later without guessing.