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Just posting some videos I found of devs playing the game. Most gameplay videos show people playing the game for the first time (on conventions and such) so this gives a better view of how the game should play once you get a bit of experience.
Most of them are already pretty old (a half year or even older)
Some PvE:
http://www.youtube.com/watch?v=iL9MnZGLZmM
http://www.youtube.com/watch?v=7FGrylrepOI
Edit: Just found out that the second video only shows a short bit of a presentation, the full presentation can be found here: http://ff.247xs.nl/tcos/ffb-tcos-presentation.wmv
PvP (edit: The video is already one and a half year old, wait till the end for the pvp action):
http://www.youtube.com/watch?v=ZGrzqK7gE9s