Hey Mement,

Thanks for getting in touch with us!

That's definitely a weird pattern, and if I had to make a hypothesis, I'd say that pattern looks like bandwidth saturation (which would definitely explain the miserable video calls). If you check out where all the packet loss is originating at, it's starting right at hop 1 (right at your parents' router) and carrying its high latency and packet loss pattern all the way to Google. I'd recommend having a technician come out and take a look at the router, and see if they can test out another router and get better results. You can show them your PingPlotter results too; that might help them arrive to a faster conclusion and solution.

Let me know if there's anything else I can do to be of assistance!