I have no idea why no one has done it. I think because do to it efficiently would require multiple videos, ideally. Making one big video covering everything may not help people who have a specific question. And that takes time. I'm no mod, so wouldn't do any good sending it to me. But i'd contact RoboOp directly before making anything, and seeing if he can post them in a special section or if he would just want them in New Users. I would, personally, see about having a new Forum for CC Help Videos, or something like that. So that way there is a dedicated, marked section where the videos can be posted. Creating a video for various things. One for how to enter and use chat and features such as where to type, font color change, smileys, biblegateway, and explaining the features that are only for paying users. Also how to work the Youtube based rooms, and a quick explanation of each room. Such as Singles is 18+, teens is 13-19 only, etc.. One for navigating Forums with Reply, Reply With Quote, Multiquote, Report, Like And Rep.. etc..
Also, on the one you did, i'd skip the part before sign in. That part people get. And your wording was confusing, 'where the chat was, its here now' or something along those lines. If i didn't already know how it worked i'd have no idea what you were talking about.
Also, how to add avatar, profile pics, start user groups, edit sig, etc..
These are all things i see asked regularly.
These are all just some of my suggestions. I am a detail oriented person, and try to explain things clearly rather than rushed. So i'm saying how i would do it. But if you're doing it, then you probably won't handle it how i would. haha.