Start with a suitable receiver
Apple’s video and mirroring instructions require a compatible Apple TV, smart television or Mac and normally place the sender and destination on the same Wi-Fi network. Internet access on both devices does not necessarily mean they can discover each other locally.
A guest network can isolate household devices. If the destination is absent, first establish the receiver’s support and network reachability. Reinstalling a streaming account is not the first explanation for a television that never appears in the destination list.
Pick media streaming or screen mirroring
An application can expose an AirPlay video control, while Control Centre can provide a screen-mirroring route. Mirroring includes the device’s interface and can behave differently from an application handing off supported media.
An AirPlay audio symbol identifies an audio-output control. It is not evidence that the same button sends video. This matters when a phone appears to connect successfully but only sound reaches the television or speaker.
Check application conditions
A receiver being compatible with AirPlay does not prove that every application permits every source to be sent. Use the application’s supported playback behaviour and account terms. A native television application remains another separate path with its own login and controls.
Test the actual source and destination combination. Confirm picture, sound, subtitles where applicable and the ability to stop the session cleanly.
Keep a short discovery record
Record sender model/software, receiver model, application and whether the failure is discovery, connection or playback. Keep private account information out of the record. These details explain the technical question more clearly than calling every wireless problem casting not working.