I scienced your post so it would show the videos correctly. In the future, only include the part after "v=" but nothing after "&" (get rid of the & as well).
eg http://www.youtube.com/watch?v=hrzIykdka4s&feature=asfln24!151afsa
you only want the bold bit in between your youtube tags
eg http://www.youtube.com/watch?v=hrzIykdka4s&feature=asfln24!151afsa
you only want the bold bit in between your youtube tags