Here is a tutorial from UCLA that will help you to avoid plagiarism!
Plagiarism? What is it?
Plagiarism is copying someone else's ideas and thoughts and using them as your own, this includes homework! Copying a friend or sibling's work is plagiarism.
Plagiarism is purchasing material on the Internet and using it as if it were your own.
Using any material either in print or on the Internet without giving the author(s) or owners credit is plagiarism.
Even though some material on the Internet is in the public domain, it does not mean you can use it without citing or acknowledging where you got the information.
Whether it is an article, video, image, or other type of information, you can not use it unless you provide a citation.
Here are two more short videos to watch, too.