what exactly is copyright?

Question

if me and a couple of friends made a video were my friend sings sexy back and publish it in the web.......is that aginst the law, can I go to jail for that?

Answer 1

Copyright is the legal right granted to an author, composer, playwright, publisher, or distributor to exclusive publication, production, sale, or distribution of a literary, musical, dramatic, or artistic work.

My answer to your second question is - probably yes, if it turns out to be porn and someone complaints and reports you to the proper authorities.