Turn the music off on your Let's Play Videos
Kitty Powers' Matchmaker uses licensed music because we have a LOT of music and it's expensive to get your own composed.
Because of that though, you MAY have issues when posting 'Let's Play' videos to Youtube because it detects the music and puts a content claim on it. Sadly our license does not currently cover other people broadcasting that music and making money from those broadcasts.
We may be able to change that in the future (depending on how much it will cost us!), but for now we would advise you to turn the music off in the options menu before recording your game footage. This will eliminate the issue.
You are totally safe to leave all other sound effects on as loud as you like as they belong to us :-)