That sounds good. You are free to monetise any other way - you still hold the copyright in the original file.
It's worth remembering that YouTube always allows copyright holders to retain ownership of their work. But under their terms of service they require you to grant to YouTube a non-exclusive, worldwide, perpetual license to freely sub-license, re-distribute, re-publish, monetize, and whatever they may want to do with your video. They’re basically requiring that you grant YouTube all of the same rights that you have with your video, short of turning over your rights to them.
Put simply, it's as if YouTube and you are joint copyright holders in all but name - you still hold the full copyright, and may sell sub-licences (as you have in this case) but you have granted YouTube the widest possible use of the file as well, for which they pay you precisely nothing.