Using Annotations in YouTube an easy way to highlight important points in your video.
It's great for underlining takeaways and to do's. Or, have fun with them and undercut what is being said on screen like when Woody Allen used subtitles in Annie Hall.
You create the annotations after you have uploaded your video to YouTube. There's a really simple editor that you can use to make thought bubbles, text in boxes, or links to share other URLs in YouTube.
Check out this simple one that I made.
Title: A Blogger At Work