The video tells a little bit of the story of the Dinobots and how they ended up in their dinosaur form without going to planet Earth.
The Dinobots consist of Grimlock, Swoop, Sludge, Slag and Snarl, which have been around since Generation One (G1) back in 1984. Their origin story changes depending on which Transformers reality they hail from. For Transformers: Fall of Cybertron, the writers are making sure to examine the Transformers lore very closely and what they have come up with for the Dinobots should delight fans.
No matter their incarnation, the Dinobots have and will always be the group of dedicated warriors with an egotistical aura about them. The mix of five different personalities is just one aspect that fans enjoy about them, besides being bad ass.
Transformers: Fall of Cybertron launches on August 28th for the XB360 and Ps3 systems. It will continue the story from War for Cybertron that tells the story of the civil war between the Autobots and the Decepticons.