Live+view+axis+link -

Under the "PTZ" tab, look for the setting labeled "Enable Live View Axis Link" or "Third-party PTZ control." (Wording varies by firmware version).

When camera A detects motion, switch live view to camera B. live+view+axis+link

Every Axis camera has a built-in web server. You can access the live view link by entering the camera's IP address directly into a web browser. Under the "PTZ" tab, look for the setting

<!-- RTSP via VLC web plugin (not recommended for modern browsers) --> Under the "PTZ" tab