A video processing apparatus includes an output terminal, a reception unit and a control unit. The reception unit receives one of a first command and a second command from a control apparatus, wherein the first command is for locking a data format of data output from the output terminal to a predetermined data format, and the second command is for not locking the data format of the data output from the output terminal to the predetermined data format. The control unit controls to lock the data format of the data output from the output terminal to the predetermined data format, if the first command is received by the reception unit. The control unit controls not to lock the data format of the data output from the output terminal to the predetermined data format, if the second command is received by the reception unit.