The most interesting part about this (which they don't mention on the homepage) is that they are collecting data which they use to retrain a neural neural network that predicts transmission time. This neural network and a predictive model are paired to do things like adaptive bitrate selection and congestion control. They even retrain the model every day based on the past day's data.

This approach apparently performs better than using just a predictive model or just a neural network without any explicit model at all.

They also say they plan to open this up to other research and that they will continue running the site for a couple of years.