A shared screen works better when caption preferences are discussed before the programme starts. Ask what information is essential and which presentation choices are flexible. A household agreement can make the evening easier, but it cannot create a track or control that the actual programme and player do not supply.
Keep the discussion practical. People should be able to state a viewing need without explaining personal medical details.

Separate access needs from style preferences
Someone may need speech and sound information to follow the programme. Another person may prefer a particular text size or background. Both deserve a hearing, but they are not the same question. Establish the essential information first, then discuss presentation within the genuine options.
Avoid deciding by majority whether an essential track will be used. Instead, look for a suitable title and arrangement that lets the group participate. A different programme can be a better compromise than keeping the chosen title while leaving a viewer without needed information.
Agree who changes settings and when
One simple routine is to choose the track before playback and pause if someone asks for a change. If the programme is live and the actual arrangement does not support pausing, agree how to handle that constraint. Do not announce a flexible routine that the product cannot perform.
If preferences are stored by profile or account in the particular app, respect that organisation. Do not repeatedly overwrite another person’s settings without discussing it. Where persistence has not been established, keep a small non-sensitive note of the preferred starting arrangement instead of assuming the app will remember.
Let preferences change with the session
A documentary with many names may call for a different text choice from a familiar film. Visitors may also have different needs. Revisit the agreement briefly rather than treating a past setting as permanent household policy.
A useful note might say captions on for shared evening viewing, with the language confirmed per title. That records a functional preference without private personal history. The objective is a clear, respectful starting point that can be revised when the people or programme change.
Useful answers
Should we vote on whether someone gets an essential caption track?
Look for an arrangement and title that meets the group’s access needs. Do not treat essential information as merely a decorative preference.
Can the household promise one style in every app?
Only where the actual controls support it. Confirm the available options on the intended screen.