I think I worked out 2-factor and also got it working with the new 2.5.1 addons repo, if you want to test here’s the links - use whichever one that your version supports.
org.openhab.binding.ring-2.4.0.jar
org.openhab.binding.ring-2.5.1-SNAPSHOT.jar
You’re going to want to delete and recreate your account thing at the very least, if you use two factor put in your username and password and save. When you get the SMS from ring.com, go back into the account thing configuration and enter the 2 factor code and save again. If all goes well, it will come online and start discovery of your other ring devices. This should also fix the issue @jwiseman was having with the account going offline, that was just set up when the session refreshed it would put it “offline” while it refreshed - it now keeps the account Thing online during that.
I’m also still trying to sort out the video URL, my focus was more on getting 2 factor working first because that seemed more important. I’ll try to get it going soon but I don’t have an ETA at the moment.