Start with essential tasks
Try opening an item, pausing and resuming, changing volume, selecting captions and finding audio options where available. Include returning from a full-screen view and recovering after an error.
Use the input you actually depend on: remote, keyboard, touch or assistive technology. A control that works with a mouse may still be hard to find or operate through another method.
Check focus and understandable names
When using a keyboard or remote, notice whether you can identify the current control and move away from it. A visible icon is not sufficient if its function is unclear through the input or assistive technology you use.
For a screen reader, listen for meaningful control names and states. A pause/play control should communicate the relevant current action. Record an unclear control rather than assuming that every unlabeled icon has the same function.
Test the full task, including failure
A menu opening successfully does not establish that its options can be selected and dismissed. Try a realistic journey and check whether focus returns somewhere useful. If content is unavailable, can you read the error and get back to another item?
Do not change accessibility preferences merely to make a demonstration pass. Keep the configuration you need and record the exact app/device combination tested.
Use the finding for a specific decision
W3C recommends accessible media players as part of media accessibility. Your own observation can establish whether a particular task worked in a particular setup; it is not a formal certification of the whole product.
When reporting a problem, name the control, input method, expected action and actual result. Include software versions without sending private account information. Specific findings help a developer reproduce the barrier and help you compare alternatives.
Questions about this guide
Does mouse operation prove remote or screen-reader access?
No. Test the input and assistive technology you actually use.
Can one checklist certify accessibility?
No. It can document a bounded set of tasks and barriers. Formal conformance requires a wider appropriate assessment.