Comelit MT COMELIT VSC IP START SERIES - Manual (Page 14)

2.2.1 Local video search
Click icon in front of the device information while all channels following this
device will be selected, click icon in front of icon to show the scope
selection drop-down list and determine to search the needed channels video (Each
device only support 9channels video playback at the same time, different devices
record video can not playback at the same time). Set the date, select record scope
(Local video) and click video search to view the record video.
As figure below:
2.2.2 Video playback
Click to play, click to stop, double-click on the video progress
bar can pinpoint playback. As figure below: