I loved this feature for my online lectures.
Originally these are the features you get:
Just the Video Quality options.
To get the speed options you have to enable HTML5 Playback on youtube by Scrolling down to the bottom to the footer and clicking the “Try something new!” link.
When on this page scroll down to the HTML5 options:
Click on “Try it out”.
This takes you to a page where it shows you all the enabled payback types and HTML5 should be off:
Click on the “Join the HTML5 Trial” link.
Then the page will change to:
This means you are all set!
Now when you go back to the video and select settings you will see: