Also when I do past the code eg:
<iframe width="560" height="315" src="//www.youtube.com/embed/TPf1E1Hbe2o" frameborder="0" allowfullscreen></iframe>
into the HTML code window = "<>"
I shows and can play the video with in the WYSIWYG editor window
However, in the course is display the following error which I also pasted a screen shop here before:
"Server not found
Firefox can't find the server at %3ca%20href=.
Check the address for typing errors such as ww.example.com instead of www.example.com If you are unable to load any pages, check your computer's network connection. If your computer or network is protected by a firewall or proxy, make sure that Firefox is permitted to access the Web"
There is no firewall or proxy set up.
In Safari the image is blank as in the screen shot I also provided.
So it shows in the WYSIWYG editor window that is is reading the embed code, Just that is it not displaying it in the course.