This guy is absolutely painful to listen to, but it demonstrates that cheap dash cams aren't worth wasting your time or money with.
Interestingly, the Viofo A119 V3 he uses to demonstrate is obsolete in that it utilizes a Starvis sensor and not the latest generation Starvis 2 sensor.
The dash cams he is looking at here really are the bottom of the barrel.
On the flip side, Vortex radar is worth subscribing to: