In this Time Magazine article, Claire Suddath interviews Greg Kot, who is a music critic for the Chicago Tribune. He gives his argument that the internet is a positive for music and the music industry. He has also written a book about the topic.
This is just a Wikipedia article about the history of music publishing but I shared it because I remember my music prof. at Mason talking about Stephan Foster being the first songwriter who got copyright over his material and he is mentioned in this post. Its interesting to see how far back the laws go in different countries.
This website has some more advanced URL tricks to make your YouTube experience better. Most of these tips are for embedding videos, but there are tips for viewing as well.
Don't forget about the Internet Archive and especially the Wayback Machine in your research -- lots of good free stuff here, and you can look at what websites looked like years ago.