Everyday there are violations of copyright going on all around us. With the evolution of the internet, the doors have opened even wider with possibilities for copyright violations to occur. Places like YouTube have been a common place for copyright infringements to occur as people use music and pictures to create the next YouTube sensation.
YouTube has taken extra precautions to make sure that copyright violations are caught promptly however it doesn't always mean having your video banned. Sometimes the artist, musician or creator can actually allow your video which features their work to go live. Why? Because word of mouth advertising is sometimes the best advertising there is.
Watch this video from TED to see how YouTube's system works: