This depends on which DVR. There are three types of video outputs that vary by DVR model. The three types of video output connections are: BNC, S-Video, and VGA.
A BNC video output can be connected to CCTV monitors (BNC inputs) or connected to a standard television with RCA video input but using a BNC to RCA male converter. You CAN NOT convert the BNC cable to a F-connector and connect to the CATV (cable tv) input of a television. CATV input is different from video input and can not be used for surveillance system monitors.
An S-Video outputs can be connected to a standard television monitor which has an S-Video input. Most modern televisions have s-video inputs and/or RCA video inputs.
A VGA output can be connected to a standard VGA computer monitor.
Please consult our surveillance dvr page and review the features of the DVR you are interested in to determine which type of video output is supported or contact us if you need help in determining this.