Magnar Sveen has Episode 12 of Emacs Rocks up. This time it's about editing HTML. As usual, Sveen demonstrates some nifty tricks to make editing easier. Some of them use standard Emacs functionality and others extensions that he has written.
My only complaint is that the video moves very fast and it's sometimes hard to see what he's doing without replaying it several times. That problem is mitigated to some extent by a listing on the episode page of all the commands that he's using. The pacing problem notwithstanding, this episode, like the others, is outstanding. You may also want to pick up some of Sveen's extensions. They are very useful; I already can't live without some of them.