HTML directory?

I know HTML code is used on here, but it'd be nice if before leaving a reply or something, there's the usual "advance options" button and whatnot and show what HTML codes you can use Same if you wanted to link a video, would you do like [video] or would you put "youtube" or whatever Since some forums use [img] while others use <img> and whatnot. It'd just be nice to have for convenience And the ability to quote someone