macOS · Research guidance. Instructions are based on publisher guidance; a UK IPTV account was not tested on this platform.
Identify the interaction that failed
Choose a harmless keyboard action in the actual app, such as opening a menu or moving to a control. Note whether a brief press is ignored while a held press is accepted. Keep the user’s access preferences intact; an intentional timing accommodation should not automatically be described as a broken keyboard or slow player.
Inspect the documented setting
Apple documents System Settings, Accessibility, Keyboard and Slow Keys. Its Acceptance delay specifies how long the Mac waits before accepting a key press. Check the current value rather than treating the time from finger movement to interface response as a direct measurement of network or media-server delay.
Use feedback if helpful
Apple provides optional click-key sounds, with different feedback for pressing and accepting a key in the detailed settings. Use the configured feedback to understand the action if it is useful to the viewer. It is separate from programme sound, and changing the app’s audio track is not an appropriate way to investigate a keyboard feedback sound.
Compare without removing needed access
If the user chooses a temporary comparison, note the original delay, adjust only that relevant control and repeat the same harmless action. Restore the useful setting afterward. A support report should name the timing preference, gesture and result; it should not claim that every playback delay has been solved because one shortcut became easier to activate.
Questions, answered
What does Acceptance delay govern?
How long the key is pressed before the Mac accepts it.
Does that delay measure streaming latency?
No. It is a keyboard input timing choice.