A:Answer 1) Yes, you can use this monitor with a MacBook Air. But you will need an adapter. You can refer to this website to determine the right adapter: https://support.apple.com/en-us/HT201736 You will need an adapter to the HDMI port on the monitor. 2) The split-screen option would be available through the macOS. The monitor just displays or extends what is on your MacBook Air. Here are some instructions on how to use split-screen: https://support.apple.com/en-us/HT204948 and how to use a monitor with your MacBook Air: https://support.apple.com/en-us/HT202351 3) Yes, this monitor has the capability to be tilted forward 5 degrees or 25 degrees backwards. 4) Yes, you can stream videos on this monitor.