An information processing apparatus, comprising: a communication interface (137, 138, 139, 140); and processing circuitry configured to: transmit, via the communication interface, an instruction signal to a first camera apparatus (101-A) to capture a first video and to a second camera apparatus (101-B) to capture a second video; receive a tagging operation request from a user after the instruction signal has been transmitted to the first camera apparatus and the second camera apparatus; and in response to the tagging operation request, transmit, via the communication interface, a first control signal comprising timing information of a time when the tagging operation request was received from the user to the first camera apparatus that causes the first camera apparatus to generate a first thumbnail of a first frame of the first video, wherein the first thumbnail of the first frame is generated for a timing indicated by the timing information, and transmit, via the communication interface, a second control signal comprising the timing information to the second camera apparatus that causes the second camera apparatus to generate a second thumbnail of a second frame of the second video, wherein the second thumbnail of the second frame is generated for a timing indicated by the timing information; receive the first thumbnail from the first camera apparatus; and receive the second thumbnail from the second camera apparatus. a communication interface (137, 138, 139, 140); and processing circuitry configured to: transmit, via the communication interface, an instruction signal to a first camera apparatus (101-A) to capture a first video and to a second camera apparatus (101-B) to capture a second video; receive a tagging operation request from a user after the instruction signal has been transmitted to the first camera apparatus and the second camera apparatus; and in response to the tagging operation request, transmit, via the communication interface, a first control signal comprising timing information of a time when the tagging operation request was received from the user to the first camera apparatus that causes the first camera apparatus to generate a first thumbnail of a first frame of the first video, wherein the first thumbnail of the first frame is generated for a timing indicated by the timing information, and transmit, via the communication interface, a second control signal comprising the timing information to the second camera apparatus that causes the second camera apparatus to generate a second thumbnail of a second frame of the second video, wherein the second thumbnail of the second frame is generated for a timing indicated by the timing information; receive the first thumbnail from the first camera apparatus; and receive the second thumbnail from the second camera apparatus. transmit, via the communication interface, an instruction signal to a first camera apparatus (101-A) to capture a first video and to a second camera apparatus (101-B) to capture a second video; receive a tagging operation request from a user after the instruction signal has been transmitted to the first camera apparatus and the second camera apparatus; and in response to the tagging operation request, transmit, via the communication interface, a first control signal comprising timing information of a time when the tagging operation request was received from the user to the first camera apparatus that causes the first camera apparatus to generate a first thumbnail of a first frame of the first video, wherein the first thumbnail of the first frame is generated for a timing indicated by the timing information, and transmit, via the communication interface, a second control signal comprising the timing information to the second camera apparatus that causes the second camera apparatus to generate a second thumbnail of a second frame of the second video, wherein the second thumbnail of the second frame is generated for a timing indicated by the timing information; transmit, via the communication interface, a first control signal comprising timing information of a time when the tagging operation request was received from the user to the first camera apparatus that causes the first camera apparatus to generate a first thumbnail of a first frame of the first video, wherein the first thumbnail of the first frame is generated for a timing indicated by the timing information, and transmit, via the communication interface, a second control signal comprising the timing information to the second camera apparatus that causes the second camera apparatus to generate a second thumbnail of a second frame of the second video, wherein the second thumbnail of the second frame is generated for a timing indicated by the timing information; receive the first thumbnail from the first camera apparatus; and receive the second thumbnail from the second camera apparatus.