How do you have the cameras listed in the app? How many cameras? In a group? What kind of WiFi network do you have? How many other WiFi connections does it have active? The more info the better. I suspect the network may not be able to handle the added traffic.
If the extender has a different WiFi SSID, then re-setup the cameras and choose that SSID as the one you want them to connect to. I dont have an extender in my system, so i don’t have personal experience with them, but haven’t heard very positive things about them.
Short answer is no. But there are work arounds like the RTSP firmware that can be put on the camera, but i’ll let a Mac person chime in here with their experiences.
Going to need more info here about what the camera is trying to see, its distance from the camera, and what the camera settings are. To vague of info given to even take a guess. How about a daytime and nighttime photo so the collective mind here can weigh in for starters? Thanks!