In the interview done by the TV service, the journalist asked HAL if in view of his "enormous intellect he is ever frustrated by his dependence on people to carry out actions". In what way did HAL depend on people (the crew or others)?
HAL was a computer - and did not seem to have any robotic arms or effectors available to him to conduct experiments or repairs with. This meant that he was dependent on humans to carry out those specific tasks.
For example, when he reports that the AE-35 unit (the device that kept the Discovery's communication satellite locked onto Earth throughout the journey) as failing, he mentions that he has been unsuccessful in rerouting the circuits to resolve the problem and requires one of the astronauts to go out and replace the unit.
of course, it was never faulty to begin with.