It always depends on the song you are using, there are songs you simple just can acknowledge and your video still will play everywhere but advertising goes to the record label or whoever. But there are quite a few songs getting blocked in different countries and /or on mobile, regardless you try to monetize or not depend on the music and record label it still can earn you a strike if they feel the need to flag your video. Many of them will decide to advertize on your video though.
Best is, to simple take the song of your choice and render it with some sample footage and upload it unlisted, to see what will happen once it's on youtube, after which you could decide to use that song or better something else...