Hi @dougenis! Thank you for trying all those steps to get this resolved. Attempting to see video via web browser is a good step, but will only show video recordings rather than live views. Removing and reinstalling the app was also a great call! As you mentioned live view working when you tried on another mobile device, this rules out many factors and narrows down to mobile device, Ring app, and communication variables.
Please also ensure there is not a vpn enabled, or any apps operating at the same time that might conflict with the Ring app, or even take up your mobile device processing power. Testing video connection with your mobile device connected to wifi only, and on mobile data only, will help to discover if one connection is more efficient than the other.
If the above does not help with live view on any of your Ring devices, try using the Rapid Ring app, which is designed for the quickest access to a live view. I hope this helps!