Video test.

[youtube]Ym8JjY4fy-M[/youtube]

EDIT: She lives! For those of you too lazy to click "view raw", here is how I did it. You'll put the URL between the "youtube" code using brackets, and everything after the "=" sign. Here's the example I used edited so you can see it. What goes inside the "youtube" code will be emboldened.

(youtube)http://www.youtube.com/watch?v=[b]Ym8JjY4fy-M[/b](/youtube)

Now let's try it inside a hider, and a quote.

[hider=Hider Test][youtube]dQw4w9WgXcQ#t=0[/youtube][/hider]

[quote][youtube]q-WhOERP3ng[/youtube][/quote]

It's also possible to embed the video at a specific time as well.