Embedding a Youtube video into your course outline is simple. From the Youtube video page that you'd like to use, simply switch to the "Share" tab, and choose "Embed". Then copy and paste the embed code provided. Don't use the old embed code style. It should look something like this:
<iframe width="560" height="315" src="http://www.youtube.com/embed/tW1-fSRiAdc?rel=0" frameborder="0" allowfullscreen></iframe>