Copyright
Copyright is a law that gives the owner of a work (for example, a book, movie, picture, song or website) the right to say how other people can use it.
With copyright, a work can only be copied if the owner gives permission. If someone copies a work without permission, the owner can say they infringed their copyright.
Project partners should use material (images, videos) from open sources (Creative Commons) and, when they don't, they should attribute their sources.