A first processing device for performing a video call between the first processing device and a second processing device, the first processing device comprising: a storage for storing detection information; and at least one processor which is configured to - detect a face region of an image, - set at least one action region according to the position of the face region, wherein said at least one action region is arranged nearby the face region without overlapping the face region when considered in said image, - compare image data corresponding to the at least one action region to the detection information for purposes of determining whether or not a predetermined action for ending the communication relating to the video call has been performed, the predetermined action being a gesture action of a user using body parts, and - end or not end the communication relating to the video call based on received cooperation control information for ending the communication relating to the video call, wherein the first processing device and the second processing device are caused to perform processing based on the cooperation control information, whereby the communication relating to the video call between the user of the first processing device and the user of the second processing device is ended, characterized in that the cooperation control information for ending the communication relating to the video call is received only when it is determined that first, the user of the first processing device has performed the predetermined action and that, subsequently the user of the second processing device has performed the predetermined action, such that the communication relating to the video call between the user of the first processing device and the user of the second processing device is ended in this case, but not in case it is determined that the predetermined action has been performed at only one of the first and the second processing device (100A, 100B). a storage for storing detection information; and at least one processor which is configured to - detect a face region of an image, - set at least one action region according to the position of the face region, wherein said at least one action region is arranged nearby the face region without overlapping the face region when considered in said image, - compare image data corresponding to the at least one action region to the detection information for purposes of determining whether or not a predetermined action for ending the communication relating to the video call has been performed, the predetermined action being a gesture action of a user using body parts, and - end or not end the communication relating to the video call based on received cooperation control information for ending the communication relating to the video call, - detect a face region of an image, - set at least one action region according to the position of the face region, wherein said at least one action region is arranged nearby the face region without overlapping the face region when considered in said image, - compare image data corresponding to the at least one action region to the detection information for purposes of determining whether or not a predetermined action for ending the communication relating to the video call has been performed, the predetermined action being a gesture action of a user using body parts, and - end or not end the communication relating to the video call based on received cooperation control information for ending the communication relating to the video call, wherein the first processing device and the second processing device are caused to perform processing based on the cooperation control information, whereby the communication relating to the video call between the user of the first processing device and the user of the second processing device is ended, characterized in that the cooperation control information for ending the communication relating to the video call is received only when it is determined that first, the user of the first processing device has performed the predetermined action and that, subsequently the user of the second processing device has performed the predetermined action, such that the communication relating to the video call between the user of the first processing device and the user of the second processing device is ended in this case, but not in case it is determined that the predetermined action has been performed at only one of the first and the second processing device (100A, 100B).