I suggest that you copy and paste your links to imgur (if pic under 2 MB) or to some other reliable pic hosting site. It's a bit tiring to see you fail again and again.
<iframe width="560" height="315" src="http://www.youtube.com/embed/z07TAM5Cc3A" frameborder="0" allowfullscreen></iframe>
Photobucket has a cool little Firefox app that allows you to simply right click and upload it to your account. Then it has a little menu that lets you quickly copy the code. Very fast and easy to use.
<iframe width="420" height="315" src="http://www.youtube.com/embed/1VuMdLm0ccU" frameborder="0" allowfullscreen></iframe>