iPad sharing affects audio quality

[Youngari]

On my iPad Pro 5th generation, I am sharing a video (sound optimized) which shares fine for the participants but on my iPad the sound then becomes very low. Sound is fine before sharing. Everything is tuned up to max but I barely hear it. I have tried using an ear piece but same result. This makes it very hard to lead a class when the students can hear the video but I barely can.  Any suggestions?