Hi there!
The audio in my collections has been demonetized on YouTube, meaning that people can post videos, walkthroughs, etc. without getting a copyright violation notification. I can't imagine how you would come under any legal scrutiny if someone posted a video of them playing your game with audio that you've purchased for it. Others have used my music after purchasing via other marketplaces (Unreal, Epic, etc.) and posted on YouTube without any issues that they have reported to me.
Since this audio is up for grabs to be used by game developers, all I ever really ask is that they credit me where it is used as a courtesy.