Explanatory vidya
<span data-s9e-mediaembed="youtube" style="display:inline-block;width:100%;max-width:640px"><span style="display:block;overflow:hidden;position:relative;padding-bottom:56.25%"><iframe allowfullscreen="" scrolling="no" src="http://www.youtube.com/watch?v=3ft7kkXO98c" style="background:url(http://i.ytimg.com/vi/3ft7kkXO98c/hqdefault.jpg) 50% 50% / cover;border:0;height:100%;left:0;position:absolute;width:100%"></iframe></span></span>________________________________
--m(^0^)m-- Wot, no sig?
<span data-s9e-mediaembed="youtube" style="display:inline-block;width:100%;max-width:640px"><span style="display:block;overflow:hidden;position:relative;padding-bottom:56.25%"><iframe allowfullscreen="" scrolling="no" src="http://www.youtube.com/watch?v=3ft7kkXO98c" style="background:url(http://i.ytimg.com/vi/3ft7kkXO98c/hqdefault.jpg) 50% 50% / cover;border:0;height:100%;left:0;position:absolute;width:100%"></iframe></span></span>________________________________
--m(^0^)m-- Wot, no sig?