What is the HTML code for this site?

[saintdane05]

I tried posting something in spoilers, but it ended up not working. What do I use for it, along with bold?

Bonus: A cookie for anyone who can tell me how to embed videos and pictures.

 

[Qitz]

Similar to HTML just square brackets instead of angle brackets.

[.spoiler.][./spoiler.] Spoilers

[.b.][./b.] Bold

[.img.][.img.] Image

[.youtube=<random string in url.] so youtube=6NRD1195912AD for example.

and so on, obviously without the periods.