Vanilla is a product of Lussumo:
Documentation and Support.
Whitechapel supports YouTube/Google video and any mp3 file. Just click the "video/mp3" quicktag, and paste the url of the video or mp3 (just the url of videos, without any of the embed code).
I just hit escape and kept going as I've never seen anything like that on Whitechapel before but I thought I'd mention it in case it is a site glitch or someone trying some kind of password fishing thingy.It's nothing for you to worry about, but thanks for letting me know. Every now and again we'll get someone linking an image (or, in this case, a profile pic) from a password-protected web directory. It'll show up fine for them, because they're logged in -- but it pops up a log in warning for the rest of us, until I hit it very hard with a hammer and/or stick.