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[[youtube]] video shortcode from Jetpack
If you have the jetpack plugin installed then a number of additional shortcodes will appear in the oik shortcode help. These include [[youtube]].
You can get a YouTube video to display just by pasting in the link ( e.g. http://youtu.be/2IYAU2qeeC8 ) ON A SEPARATE LINE
and without any anchor tags ( <a href=blah… )
see for yourself…