There are no good NVD recorders on the market. Usually the price for such devices is high and performance is mediocre. Our purpose is to help you do you own NVD recorder at a low price. 

You need 2 parts – camera and connector

This is an example of the finished product: 

Camera

Get a cheap Spy camera.

Quite many high price (300-400USD) NVD recorders use cheap SPY cameras that you can get from ebay, aliexpress etc with 20-30 USD. For example:

with WIFIhttp://: https://www.ebay.com/itm/Mini-DV-Full-HD-1080P-Wireless-IP-DIY-SPY-Micro-Screw-WIFI-Camera-Module-DVR-Cam/352094370920?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649

with remote: https://www.aliexpress.com/item/Mini-DIY-Camera-HD-1080P-Micro-Camera-DIY-Video-Recorder-Voice-Recording-Device-Mini-Control-DVR/32857661298.html?spm=a2g0s.9042311.0.0.77814c4degysEu

UPDATE: Buy with remote. Much better quality and works seamlessly. 

Connector

3D print your own connector or ask your friend to print it out.

Connector consists of 2 parts that you need to clew together (after you have installed SPY camera between those 2 parts).

Lower part
Upper part

 Download Upper part and Lower part

Results

Recorded with WIFI version

WIFI version is quite good. 

Recorded with Remote version (much better)

As you can see the version with WIFI has much better angle (smaller angle and therefore more pixels for NVD. I played around with manual gain and focus.