You can now embed your youtube videos right in your post. At the far right of the top buttons in the text editor is a white square that says "YT" - wrap those tags around just the ID of the youtube video, and it will show up in the post.
Example:
YouTube Link:
Code:
http://www.youtube.com/watch?v=eJ_BrOp49P4
Paste the ID - eJ_BrOp49P4, highlight, then click the YT button to wrap the youtube code around it.