An accessibility preference note should describe useful viewing arrangements, not become a file of personal medical history. Record the features someone wants, the context in which they matter and any relevant title-level limitation. Keep the note small enough to use and easy to revise.
The purpose is practical preparation. It should help the next session start well without defining a person permanently by an old setting.

Record functions in ordinary words
Useful entries might say same-language captions wanted for shared viewing, described audio required for the selected film or preferred text presentation where available. The note should identify what to prepare. It does not need to explain a diagnosis or make assumptions about someone’s abilities.
Ask the person how they want the preference described and who should see it. A household organiser may need a practical reminder while a wider group does not need the underlying conversation. Avoid copying private messages into a shared document merely because they contain the relevant detail.
Keep preferences and programme facts separate
A preference says what the viewer wants or needs. A title record says what the actual edition offers. Do not merge them into an assumption that the preferred feature exists everywhere. A prepared session needs both the requirement and a suitable programme.
For a hypothetical note, keep the caption language preference on one line and the checked film edition on another. If the film changes, recheck its tracks while retaining the preference. This prevents a programme-specific observation from becoming a false platform-wide promise.
Use a small revision routine
Before a materially different session, ask whether the note still fits. A familiar comedy, a live programme and a detailed documentary can lead to different choices. Allow a person to change a preference without explaining or defending the change.
Record the observation date for title checks and label untested arrangements honestly. If an option was unavailable in one item, keep that narrow fact. Do not rewrite it as a statement that the person cannot use the service or that the entire library lacks the feature.
Keep the record proportionate
Avoid passwords, private source addresses, payment information and unnecessary personal detail. The note can point to a genuine setup guide without duplicating secret account material. Keep it where the intended household members can use it appropriately rather than broadcasting it as public feedback.
After a session, retain only the lesson that helps future preparation. A brief update about the chosen track or a useful control may be enough. The best record supports a respectful conversation; it should not replace asking the person or turn an old arrangement into a rule nobody feels able to change.
Useful answers
Does a useful preference note need medical details?
No. Record the practical feature, context and agreed visibility without collecting unnecessary sensitive information.
Can a saved preference guarantee title availability?
No. Keep the viewer’s requirement separate from the actual programme’s checked options and recheck when the item changes.