No, security cameras do not always record. There are a number of reasons why this might be the case, including technical difficulties, power outages, and intentional tampering. However, even when security cameras are not recording, they can still serve as a deterrent to crime.
Frequently Asked Question
Do security cameras always record?
Do outdoor cameras always record?
Which security cameras have continuous recording?
What does the red light mean on a security camera?
What does a blue light on a security camera mean?
Do all cameras record video?
Edge Storage: Saving Footage To A Camera When a security camera is recording footage only to a MicroSD card, it usually isn’t recording all the time. These cameras are typically only set up to record during events, such as motion detection, line crossing detection, etc. 
Some record constantly while others only store footage when motion is detected. Cameras that record constantly are ideal if you want peace of mind that ensures you can check what’s happened in your home at any point. 
Some (or all) of the smart cameras from Google Nest, Arlo, Eufy, Wyze and Kasa support 24/7 continuous recordings, although brands like Ring and Blink (that don’t offer this) offer alternative features instead. 
Security Cameras have small Red Lights (sometimes Other Colors) to indicate that there is a recording in progress. For cameras that are constantly on, that light will also be on 24/7. For other Cameras, like the Blink, the light will only come on when motion is detected and a clip is recorded. 
LED setup reference guide A flashing blue light on a security camera means you are ready for the WiFi protected setup. To enter the WiFi protected setup mode, push the WiFi protected setup button and release it when the light begins flashing blue (about three seconds). 
Camera manufacturers have improved video recording features over the years. However, most digital cameras made for photography can’t compete with devices made specifically for recording video. There are some exceptions. The built-in iPhone camera is exceptionally powerful, and some directors use iPhones to film movies. 
In short, no security camera does not always record. There are many factors that contribute to why and when a security camera records. However, the most important factor is usually whether or not there is an event that triggers the recording.