I have a camera that monitors my driveway while we are away (in fact we have two). No need for DVR - It send me 15sec video clip by email each time it senses movement (or sound). It is possible to view live video and with add-ons to record video. It does need a wifi signal.

The ones I have are Dlink DCS-933L . They have IR capability so work day and night. This model is not supposed to be used below 32F or above 104F.

These are sort of like a souped up baby monitor, but I have found them to work well. Currently our cameras are outdoors monitoring our crawl space - We have had nightly visitors trying to get in! (Racoon and Skunk)

These are inexpensive units - Check on Amazon. There are many other models some with SD card recording, some more suited for outdoors, some with remote pan/tilt etc.

__________________
Graham
85 300D,72 350SL, 98 E320, Outback 2.5