This single camera shot is for a slow motion video for pedigree dog food. It is filmed using a phantom camera, it shoots 1000 frames per second.
This single camera shot is of NFL players showing off their skills to try and get chosen for the best team. They use this single camera technique so that the camera is always concentrating on the players.
The big bang theory uses the single camera technique because it is easier for the actors to concentrate on one camera than it is to concentrate on more than one. The director can then get the best performance from the one camera.