The Talkies (video-enhanced sites)

I've been watching as more and more sites use video to introduce, explain, or generally teach users the value they offer. I don't mean tutorials per se (like Mog's tours), but optional homepage embellishments, etc, that tastefully tell the story. (As opposed to this.)
I just came across perhaps my new favorite example of the concept: Google positioning this video on a standard map page. They linked to it from a post on "getting around in your neighborhood." I'm guessing a lot of Google map users are still unaware of the "re-routing (drag route)" or "directions by walking" features.
In the last 18 months I've found myself pitching the power of on-site videos like these. But it wasn't until now I see the comparison to when film gained sound. I think the level of engagement we users experience takes a significant step forward.