Before a group session that needs audio description, establish the exact described programme and the route you will use. A general promise that the service has accessible content is not enough to choose a particular item. Prepare the access arrangement while there is still time to change the title comfortably.
Share the preparation rather than making the person who needs description solve everything after the group has arrived.

Confirm the programme identity
Use the title, edition and episode information that distinguishes the intended item. A poster can help recognition but does not establish the available audio. Check the genuine listing and the actual described language for that route.
If the group plans to use a different app or version from a previous session, recheck it. A successful earlier evening is useful history, not a guarantee of identical tracks elsewhere. Keep the new observation linked to the actual item.
Prepare a narrow access check
Where practical, use the genuine player controls to select the described track before the session. Inspect a short authorised portion and note the result. Do not claim to have audited the whole programme’s descriptive completeness.
If the track is unavailable or not selectable, choose the next action early: ask through genuine support, use another authorised suitable route or select a different title. Avoid making an essential feature contingent on a vague hope that it will appear later.
Tell the group what is confirmed
A concise invitation can state the chosen title, described language and any practical arrangement people should know. Ask for additional functional preferences without soliciting diagnoses. If something remains unconfirmed, say so before treating the programme as fixed.
Agree the playback routine, including how to request a pause where supported. Let other viewers know that the descriptive narration is part of the chosen version. This avoids an accidental change by someone who mistakes it for an unwanted setting.
Retain a usable backup and outcome
Have a suitable alternative where practical. A backup title gives the organiser an ordinary social choice if the planned version does not meet the need. It should not be presented as evidence that the first provider will fail.
After the session, note the edition actually used and any issue that remains. Keep account details private. A successful group evening can inform the next plan while staying a narrow observation about those people, that programme and that arrangement.
Useful answers
Does a platform’s accessibility page confirm the selected film?
It provides context, but establish the exact title, edition and described language before relying on them.
Should the organiser ask for a medical explanation?
Ask for practical viewing preferences and essential features instead. Personal diagnoses are unnecessary for this planning task.