Run the check
Use the same short audiovisual clip in two apps and note lip-sync direction.
Compare wired and Bluetooth output without changing the source.
Turn off one optional audio effect and retry the same scene.
Read the result
A delay confined to one app points to playback settings rather than the headset alone.
Limits and next step
A web page cannot measure end-to-end Bluetooth latency in milliseconds without external equipment.
Repeat the check after changing one setting or connection. Keep a record of what changed before deciding whether the device needs service.