Just for fun, I recorded a video of myself working through this article and trying to recreate the chat app it describes how to build. Did it work? If you watch the hour-long video you can find out! You can view the video here. Is this useful? If it is, let me know, and I'll do some more videos like it. Update: I didn't record the video at a high enough resolution to make the text readable. So - imagine you are watching this, and let me know whether you would find it useful.