Public domain means that there is no copyright on the content. You are free to use it as and when you want it. This means a lot of the material is old -it has comeout of copyright. But that is not necessarily the case- there is plenty of modern material in the public domain. In this video, we explain how you can find and use public domain material. And because this can be long and fastidious, we suggest something that you can buy cheaply that will speed this up.