Amuse protects and monetizes your music on YouTube and collects payments that can be retrieved from the Amuse app as we do in other stores.
Here are your options for dealing with YouTube.
1. Amuse continues to collect money/monetize your YouTube channel and all other YouTube channels that use your music. You can withdraw the payments from the Amuse app.
2. Amuse releases its claims on your music and all other channels using your music. Your music will no longer be monetized on YouTube at all but Amuse will still collect revenue from all other music stores. You can do this in the app before release by not choosing YouTube as one of the stores to deliver to. You can also contact support after release.
In all of the cases, you own the rights to the work 100%. Amuse is only acting as a collecting service in this regard.
Read more about YouTube: Why do I get copyright claims on my YouTube video? What is YouTube Content ID? and How does it work on YouTube?