An example. Pino's WSS waltz is done to Kenny Rogers "If I were a painting". That audio has been disabled by youtube. And frankly, I think this is doing the music artist a disservice. I have, in the past, bought some of the songs in the dance videos from iTunes because I liked the song. With a disabled audio, I am not going to hear the song, and obviously am not going to buy it.
Additionally, when someone posted the WSS Waltz of William Pino they violated more than the musical copyright they also violating the rights of the World Superstars Dance Festival, because they own the production, they legal acquired the rights to music for distribution and paid the performers, set up the venue, and recorded at great expense the production for which they also make DVD’s available…so a WSS posting unless it’s by the organizers (owners) of the production themselves is a further copyright infringement (another thing that was not even covered)
I will say that any corporate entity will have the most conservative view of existing law and case law in order to protect their (possibly deep) pockets.
My personal opinion is that the owner of something should have the sole right as to how it's used. Nobody else should be able to decide for me whether I give away my music/photos/videos/whatever, except for me.