Line Breaks
My basic recommendation for learning how line breaks work is to experiment and discover — hit <Enter> once (i.e., insert one newline), then hit it twice (i.e., insert two newlines), see what happens. You’ll soon learn to get what you want. “Markdown Toggle” is your friend.
Here are some things to try out:
Here's a line for us to start with.
This line is separated from the one above by two newlines, so it will be a *separate paragraph*.
This line is also a separate paragraph, but...
This line is only separated by a single newline, so it's a separate line in the *same paragraph*.
Here’s a line for us to start with.
This line is separated from the one above by two newlines, so it will be a separate paragraph.
This line is also begins a separate paragraph, but… This line is only separated by a single newline, so it’s a separate line in the same paragraph.
(Technical note: Markdown Here uses GFM line breaks, so there’s no need to use MD’s two-space line breaks.)
YouTube Videos
They can’t be added directly but you can add an image with a link to the video like this:
<a href="http://www.youtube.com/watch?feature=player_embedded&v=8AkLfYOgIrE
" target="_blank"><img src="http://img.youtube.com/vi/8AkLfYOgIrE/0.jpg"
alt="IMAGE ALT TEXT HERE" width="240" height="180" border="10" /></a>
Or, in pure Markdown, but losing the image sizing and border:
[](http://www.youtube.com/watch?v=YOUTUBE_VIDEO_ID_HERE)

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