Nothing but problems.

I have purchased two indoor cams that seemed to have worked fine. The "live view" was smooth with clear audio while connected to my Wi-Fi. Once I'm on cellular data, the audio is still clear but the video is loaded with pixels and freezes up. Checking the recordings on Wi-Fi or cellular data are just fine. Same issues with the second indoor cam and with a shared user on their phone. Also, live view events do not show up in my timeline. What is the problem? My Wi-Fi speeds are 300/300Mbps with RSSI -38 (low to no interference). My cellular data is 30/30Mbps which is well over the recommended 2Mbps.