So, the problem I can see with this is that (by my understanding) ZeroTier will naturally try to set up a direct connection between the two communicating endpoi

So, the problem I can see with this is that (by my understanding) ZeroTier will naturally try to set up a direct connection between the two communicating endpoints, encapsulated in whatever encryption. This means that all the NetFlix traffic will still be originating from NetFlix IP addresses. Therefore, even though the content is encrypted and non-inspectable, it can still be identified as NetFlix, and throttled.