The setting intentionally limits the audience
Apple’s AirPlay Receiver settings define Current User as the same-Apple-Account scope. A nearby device using another account may therefore be outside the selected audience even when both devices are otherwise connected normally.
Identify the intended sender before changing access. A home with several accounts can need a different supported scope from a single-user desk.
Choose the minimum useful sender scope
Inspect Allow AirPlay for on the receiving Mac. Apple distinguishes Current User, Anyone on the Same Network and Everyone, with an optional password control. Choose deliberately for the room and authorized sender rather than broadening access automatically.
After the change, select the correct Mac from a harmless sender screen. Confirm the device name and any prompt before showing private account information.
Keep receiving and programme support separate
A general AirPlay connection working does not establish that every protected video app permits that output. If only one app fails, preserve that narrower observation.
Record the sender account context and receiver scope when asking for help. This explains a visibility rule without claiming that every absent receiver has the same cause.
Questions answered
Does Current User mean everyone on the Wi-Fi network?
No. Apple describes the same-Apple-Account scope.
Should I always select Everyone?
Choose the scope needed for the authorized sender and room; broader visibility is a separate decision.
Sources & further reading
Official references for the subjects discussed. Service terms and device software can change.