The following videos are a fun way to understand what plagiarism is and how to avoid it. "I didn't know that," is not going to excuse you from the penalties of plagiarism.

Just a word of caution. Be prepared to turn the volume down at least on the first one as it is quite loud.  The last one, is a "non interactive" quiz.  Try to answer the questions before the video provides the answer and see if you were correct.