Board Thread:Questions and Answers/@comment-190.204.129.80-20150325031838/@comment-32500188-20150325035241

I know you can do so with your own originals... covers, on the other hand, it's not that simple. You'll have to do more than credit the original artist/producer in that aspect, especially if you plan on monetizing using their music, because that leans into copyrights, royalties, and such. (I mean, considering that sites like YouTube even mute covers of songs that most folks consider "fair use" when they aren't making money off of it and even giving proper credits, that's treading on a minefield if you even happen to use part of the original BGM...)

In short, If you don't have the expressed consent of the original creators of the songs, your best bet is to avoid that idea of making cash via covers altogether. You might want to consider experimenting with composing your own stuff if it's coming to something like making money off of anything, VOCALOID or otherwise... YT is very tight when it comes to copyright claims.