I'm not looking for trouble, I just want some clarification on GE'S EULA, is it legal to post video content of GE without a broadcast license? I know they haven't asked anyone to remove videos, but is it technically legal for them to do so?

very good question, id like to know the answer. And also another question.

Do all people who create those great and smooth videos own this fancy special 3D navigator thing or are there any other techniques to create those tours ?

One technique to produce those videos is. Create placemarks for each "stop" of your tour. Don't turn them on so they will not be visible during your flight. Tune your fly-speed to a low value so that the flight during the capture process will be low. As a result, all data can be loaded, all 3D objects will show up.
Now click your placemarks to fly your tour. During flight, you can turn on/off placemarks to show/hide text and icons.
When capturing your flight, go to and fro multiple times to ensure all objects of each leg are cached.
You can combine the technique of clicking placemarks, using the keyboard for horizontal flights, and using a space navigator for free flights. Go forward/backward multiple times for giving you a wider selection of takes.
When your done, take a movie maker type program and finalize your vid by selecting the best scenes of each leg. Speed up the scenes so that the speed is cool. The result will be a smooth full-data flight vid.

The WTC thing is a little creepy. :/

This is a really neat usage of GE but I too would like to know the if Google would frown on commercial uses for these kinds of videos.

I'm very curious to know the legality commericial use, I recently posted one on YouTube for our subdivision: http://www.youtube.com/watch?v=IvzVVwW1YTo