Sorry, I think you misinterpreted my question.   I want streaming from my server not to be counted against my mobile data limit. For that Telekom requires the actual audio / video stream to be delivered form a different domain than the user interface. For example https://emby.example.org for user interface and https://emby-streams.example.org for the actual stream.   I know it's a very uncommon question, but is this possible? Thank you.