Exactly how do you do this with a YouTube video? Like no URL just that thing.
(http://i.imgur.com/zuMop.png)
It's only a pic not a video
You copy the URL of the YouTube video you want then you paste it in your post, once you've done that highlight it then there is a button that says "YouTube" (It's above the first smiley) click that while your text is still highlighted. That's it.
Test it out :)
get a embed view and take a screenshot, crop it. voilà !
To help you get a better insight.
[youtube]URL of youtube video here[/youtube]
Thanks Sean! :)