How to successfully embed a YouTube video in to a web page, voiced by the English Google Translate Girl and by the German Google Translate Girl.

THIS IS THE YOUTUBE EMBED CODE FOR THE BELLAMY BROTHERS SINGING LET YOUR LOVE FLOW. BUT IT ONLY WORKS WHEN VIEWING THE PAGE FROM A SERVER. IT DOES NOT WORK WHEN PREVIEWING THE PAGE FROM A FILE ON THE COMPUTER.
<iframe width="640" height="360" src="//www.youtube.com/embed/RrmvaJOdtyk?rel=0" frameborder="0" allowfullscreen></iframe>
THIS IS THE SAME CODE, BUT NOW WITH http: ADDED, AND, PRESTO, IT WORKS FROM THE COMPUTER AS WELL AS FROM THE SERVER. IT WAS THAT EASY. NOW YOU ARE AWAY. HAVE FUN.
<iframe width="640" height="360" src="http://www.youtube.com/embed/RrmvaJOdtyk?rel=0" frameborder="0" allowfullscreen></iframe>

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