[quote=@GeekFactor]
https://www.youtube.com/watch?v=lmc21V-zBq0

(Grrr, how do you make the snappy previews show up?)
[/quote]

You enclose the url in [youtube] tags. Like this:

[code][youtube]https://www.youtube.com/watch?v=lmc21V-zBq0[/youtube][/code]

becomes this:

[youtube]https://www.youtube.com/watch?v=lmc21V-zBq0[/youtube]

Also, great song. Love it.