Is the license for Dance Monkey free?
Depending on your country, the website you're uploading to and your usage of both audio and video, the copyright-laws make it legal or illegal to use a specific song.
If you create a video-essay about music-production and must use the song as an example to show your point, you will, in many cases and places not break any laws. If you combine a still-image with the song and upload this in its entirety than you will break the law in almost every case and place.
Copyright to music is no black-and-white topic, and if you're considering using music from an artist, I would seriously recommend reading up on the laws that are applicable where you live, so to not risk a hefty fine.
Youtube has a special approach to this case, in which - when a video uses copyrighted music - the video's revenue (money from ads) will go directly to the artist. If, however, the music is not registered at a database (in germany it's the GEMA, to name an example), the video can be blocked everywhere and you will get a strike. 3 Strikes mean that your channel will be terminated.
So you will likely not risk getting sued when using music in a youtube-video, but I would recommend reading up on the laws or asking a lawyer nonetheless. Copyright should be taken very seriously.