Audio issue on video recordings

Hi everyone,

I am having an issue recording audio. I am recording my classes on a laptop via zoom and I use a computer connected to a projector to play audio and video examples to the class. The video recordings from my laptop pick up my voice just fine, but they do not pick up the audio from the recordings I play in class. I tried changing the audio settings to "musician" but the same thing happened. Does anyone know how to solve this?

Thanks