DTC officially rolled out Youtube video embedding in the forum. It's been flaky and unreliable and occasionally outright broken for some time, so here is how to make it work right:
1) There is a "youtube" button in all the neat-o buttons for Bold, Underline, etc. Click it.
2) In between the [youtube] and [/youtube] tags, put the URL to the video.
To show this video:http://www.youtube.com/watch?v=-7ot02RabBU
Put this in your post: