In some implementations, a categorization is based on a determination that the event occurred within a particular zone of interest. In some implementations, a categorization is based on a determination that the event candidate involves one or more zones of interest. In some implementations, a categorization is based on audio data and/or audio event characterization. In some implementations, the video source 501 e. g. , the camera 118 or 106 transmits a live video feed to the remote server system 164 via one or more networks e. g. , the networks 162. In some implementations, the transmission of the video data is continuous as the video data is captured by the camera 118 or 106. In some implementations, the transmission of video data is irrespective of the content of the video data, and the video data is uploaded from the video source 501 to the server system 164 for storage irrespective of whether any motion event has been captured in the video data. In some implementations, the video data may be stored at a local storage device of the video source 501 by default, and only video portions corresponding to motion event candidates detected in the video stream are uploaded to the server system 164 e.