(initial part of message deleted--see next post for details)
When it comes to the camera, the FIRST Robotics Competition (which virtually all of us on this site compete in) uses a camera for seeing objects on the playing field, such as a yellow triangle on the floor. The software knows what these objects look like--the drivers never get to see the camera's output during a match.
I'm not familiar with the clip you have seen, but if it is like the omniwheel setup commonly used in the FIRST Robotics Competition, then no, it would likely not function well in grass or sand without extensive modifications to the setup. There is another form of omnidirectional drive, known as swerve drive, that -may- be able to handle the task, but I'm not able to say with certainty (as I am not familiar with the setup of that drivetrain).
For outdoors applications, the best setup may be a skid-steer arrangement. One motor (or combination of them) powers the left-hand side, while another one powers the right side. (If you need a visual image, imagine a tank.)
Hope this helps!
<Edit>Innovation First does sell chassis and transmission kits that many teams use to build their FIRST robots, which weigh in around 130 pounds (right at 59 kilograms). Their website is
www.innovationfirst.com. Good luck with your project!</edit>