Connecting Nintendo Switch or DVD Player Audio to HomePod minis

Hi everyone,

I currently use two HomePod minis to listen to music and watch movies via my Apple TV, in combination with my projector. This setup works great! Now, I'm wondering if it's possible to play the audio from my Nintendo Switch or a DVD player through my HomePod minis. Does anyone have experience with this setup or any tips on how I can achieve this?

Thanks!