R1CKNASTY has shared a gameplay video today via YouTube of Resistance 2 that originally aired on Spike TV... it can be found below.
Next up, GameTrailers have posted another video http://www.gametrailers.com/gametrailerstv_player.php?ep=19&ch=1&sd=0 dubbed "Hale to the King". In it, Geoff finds out about the Resistance 2 story and who Hale is fighting with.
The video also features Geoff revealing the details behind the co-op campaign. Additionally, Insomniac tells us how 60 person multi-player will work.