Please use the following steps to add a YouTube video to a block or a page
- Use the youtube site to find the video you want
- Click the 'Share' button below the video
- Click the 'Embed' button next to the link they show you
- Copy the iframe code given
- Go to the page where you want the video to be
- Click on “source” button on the body section of the page
- Paste the embed code you copied
- Save the changes
Example iframe: <iframe src=http://www.youtube.com/embed/W7qWa52k-nE width="560" height="315" frameborder="0" allowfullscreen></iframe>