How to embed:
Verify your account is setup to use enhanced message editor:
1) Login, then click "settings" in the top right corner of the screen
2) On left side menu, click "general settings"
3) Scroll about 3/4 of the way down the screen to Miscellaneous options, and set the Message Editor Interface to "enhanced interface"
Now that you have the correct editor settings, when making a post simply click the "insert video" button on the post that looks like a filmstrip.
It will pop up a link box, paste the link to the video, hit ok, and you're all done!
Video embedding does not work for all videos, Youtube, Vimeo work best.