As you may have noticed (or not) there is now a new icon on the Post Options bar when creating a new post or reply. The new icon is red with the word Tube in it. This is for embedding YouTube content into your post WITHOUT pasting the code from youtube's site which does not work correctly.
Here is how it works.... You press the Tube button and it pops up a box asking for "YouTube Video ID" ... you paste in the Video ID from youtube and click OK. This will now embed the youtube video into your post.
What is the YouTube Video ID? ... if you find a video on youtube.com that you want to share you will need it's ID. The ID can be obtained from the "URL" section on the youtube site. In the URL section on youtube you will see a URL like this: http://www.youtube.com/watch?v=OzhLT5uNlgs ... the video ID is all the characters AFTER the "?v=" so in this example the video ID is "OzhLT5uNlgs" ... this is ALL you need. When it asks you for the Video ID just copy in everything AFTER the "v=" .... If you copy in anything else it will not work.