To my understand, we are protected as a class because we are producing works for educational purposes and not for profit but we must always credit the source.

Something along the line as a simple sentence like, “All right belong to so and so…”

I got a better understanding about both copyright and CC in this article.

In the past I put content on youtube using rap artists’ instrumentals and I had to make sure to give all organizations credit in case of being hunted down in the future.