The link doesn't really answer the question, which was: is ESPN3 streaming available outside the USA for Comcast customers? Typically, international streaming is not allowed.
You can select the Xfinity button on your remote, and select 'Sports' from the menu to see all live games. This will include ESPN3 events if you have HSD with Comcast.
Alternatively, you can say "ESPN3" in your voice remote.
You cannot live stream events outside of the USA. It is possible to download certain programs and movies using the Stream app to watch anywhere, but unfortunately this wouldn’t extend to live sporting events given licensing restrictions.
how about getting the ability to stream ESPN+ events via the X1 boxes, not just ESPN3