I use camect too, but it's blackbox. And I am not sure if it'll be easy for it to handle > 8 8mp cameras.

Otherwise pretty happy.

At a first look? No, or at least not well maintained Home Assistant integration.

Is Camect a self-host solution?

It's local, you have a box in your home. You can use it locally or it can connect with webrtc to pull strean.