I’ve got several Yi home 1080p cameras and one Yi outdoor camera. The former are working fine with Yi hack v3 component, as you will know and indicated here:
It doesn’t feature RTSP but it lets you access via FTP (for example to backup images to your NAS), it works great!.
However, I have not been able to integrate my Yi outdoor camera to HA, though it works great with Yi app. Right now, it seems they’re trying to get a new hack, you can see their steps here:
https://github.com/shadow-1/yi-hack-v3/issues/82
Hope this helps.