To embed youtube videos, you just put the youtube code around the Video ID number (NOT the full URL). So, for example, to embed your first video at
http://www.youtube.com/watch?v=B59PebgD_d0
, you would put in the following:



Doing so, will properly embed the video like this:

http://www.youtube.com/watch?v=B59PebgD_d0