A:AnswerYour device must have a Lightning connector. This adapter will pass audio to TV monitor.
If you have a dedicated headphone jack or Bluetooth, ear buds should work.
A:AnswerI use it with the iPhone 11 Plus to watch Netflix and others. It works very well and better than expected. I have not used it with FaceTime but it should work fine as it mirrors your phone on your tv. I am not sure at this time what aspect ratio you will get on FaceTime.
A:AnswerThis adapter is for monitoring audio & video. It will not transfer files.
I suggest an external hard drive to copy even thing from MacBook & transfer to Mac Air.