I hope this will put the medic/pyro issue to bed:
http://www.gameinformer.com/News/Story/200608/N06.0825.1923.12789.htm POSTED: 8/25/2006 7:34 PM
GI: You?ve said you?re bringing back the original nine classes. What about new classes?
Lombardi: Yeah, what we?re doing is
we?re bringing back the original nine and we?re updating all of them and augmenting a couple of them.
The most radical change will be to the medic, in terms of his capabilities and his offensive and defensive behavior. Some, like the heavy, will remain very faithful to the originals. Then there are some in between that have varying degrees of tweaks.
We looked at and talked about the commander class when we originally talked about TF2, and there was a good idea there about having somebody who was off the battlefield who could assist or give orders or that type of thing and we?re still struggling to come up with the right place for the things that we want to do there. There won?t be a commander class, per se, in that that?s the boss and they?re giving you orders. But we do still think it would be cool to have somebody who?s the eyes and ears of the team and was a different role there. So we?re experimenting with that and some other classes. Whether or not those make version one or release subsequently is still to be determined.
GI: Are most of the classes going to retain the same feature set they had in Team Fortress Classic?
Lombardi:
Again, the medic is completely overhauled, and some of them are very faithful. That?s true both in terms of offensive and defensive arsenal as well. In some cases we really saw some opportunities to really leverage the Source engine and to change stuff up. You saw a little bit of that there in the demo with some of his new capabilities, some of the ways he?s able to better interact using that technology. The medic was something that Robin Walker, who?s the co-creator of Team Fortress as you know, was always a class that he frustrated with and felt like the way it had been executed on wasn?t what he and John really had in their brains. So they?ve taken a lot of time on that to change that up, and as you?ve probably noticed that?s one surprised that we?re keeping for later to reveal what that?s going to be about.
They were probably not in the video because it was not an official trailer for a released / soon-to-be-released-any-second game and they are either still working on them, or keeping them a secret for now.