Game sound capture for pre-recorded games

Good afternoon everyone,

This may sound like a silly question, but I am a complete beginner at this, and I need a helping hand.

I have recently started to learn to edit videos for my YouTube channel, but I am having an issue with trying to capture the game sound only and retain my voice audio on OBS.

I do use mac and not Microsoft, and I am unsure if this is why OBS can't capture the sound because I think it needs WASAPI, and I don't believe this is compatible with my mac. Also, these videos are pre-recorded via my Ps5, which might be a factor in why it won't work.

I have downloaded the link for Blackhole16, but the audio is currently running through the Mac speakers. It took me forever to get this sound to work.

Thank you for taking the time to look at my question. :)