Section 29.5(d) of the Copyright Act permits showing a YouTube video in class for educational purposes, provided that it is not an infringing copy. This means that the video has to have been posted by the content creator or the copyright owner.
In order to ensure that all use of YouTube videos is legal:
Here are some hints as to how you can tell whether the copy is legal. The video:
Section 29.21 of the Copyright Act includes the user’s right to use copyright-protected works to create new works. The Act refers to this as “Non-commercial user-generated content,” but it is popularly referred to as mash-ups.
There are some conditions that apply to non-commercial user-generated content:
The user-generated content can be distributed, such as posting a video on YouTube, or on a website.