If you want to have a go at updating your video, you need to paste the embedded YouTube code as normal, then ADD
http:
between the ' and the // in the code line for the YouTube video.
This is what it looks like before:-
<iframe width="640" height="360" src="//www.youtube.com/embed/lXmsLe8t_gg?feature=player_detailpage" frameborder="0" allowfullscreen></iframe>
and after:-
<iframe width="640" height="360" src="http://www.youtube.com/embed/lXmsLe8t_gg?feature=player_detailpage" frameborder="0" allowfullscreen></iframe>
Please don't bold the http:, that is just to show you. And don't worry about the difference in inverted commas.
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