Screen recording

How can i record my voices as well as my teammates voices in game. Because every time i try to screen record and i start turning on my mic in game the audio of my screen recording became silent it loss its audio. But i saw some ios user can record their screen while talking to their teammate and i can hear the user voice as well as their teammates voice in the video but everytime i try it specially when i turn on my mic in the game it loss its audio. Some says that i must ise earphones in order to record my voice and my teammate voice in a screen recording. Is it really possible or if not is there any other way on how can i record my gameplay with my voice as well as my teammate voice