https://www.youtube.com/watch?v=lP-QQGxm2Y0

Thank you for your feedback. You can also write a review of the article under Ratings :)

The focal length is 3.04mm. The horizontal angle of view is 62.2 degrees. https://www.raspberrypi.org/documentation/hardware/camera/

We have requested this from the supplier, who has already requested the camera from the manufacturer. Unfortunately, we do not yet have an exact availability date and currently expect a waiting period of at least 2 months.

Yes it is possible but there is no sound. You can use the "motion" software to do the monitoring.

Der Sensortyp wurde von OmniVision zu Sony gewechselt. https://raspberrypi.stackexchange.com/questions/46392/camera-modules-v2-1-whats-new