There are some detailed FAQs here, but check the brief notes on this page now.
+ How do I insert a picture into a forum post?
You can attach a picture to the post, or you can get a Photobucket or Picasa account, put your pictures up there, and link to them. Use the IMG button in the editor, put the address of the picture between [IMG] and [/IMG]. We prefer linking to your pictures: our web provider charges for disk space, Photobucket and Google don’t.
+ How do I insert a YouTube video into a forum post?
Use the YouTube Button in the editor. Insert the identifier (the bit after “v=” in the Youtube link) between the [youtube] and [/youtube] BBCodes.
+ Someone said something that offended my religious sensibilities/gender politics/choice of bike.
There, there. Never mind.