In some implementations, the video source 501 implements two parallel upload connections, one for uploading the continuous video stream captured by the camera 118 or 106, and the other for uploading video portions corresponding to detected motion event candidates. At any given time, the video source 501 determines whether the uploading of the continuous video stream needs to be suspended temporarily to ensure that sufficient bandwidth is given to the uploading of the video segments corresponding to newly detected motion event candidates. As shown in FIG. 5, the video source 501 includes a camera 118 or 106, and an optional controller device. In some implementations, the camera 118 or 106 includes sufficient on board processing power to perform all necessary local video processing tasks e. g. , speaker for outputting audio. In some implementations, the cameras 118 are each configured to operate in a day mode and in a low light mode e. g. , a night mode. In some implementations, the cameras 118 each include one or more IR illuminators for providing illumination while the camera is operating in the low light mode.