If you are trying to watch hockey on Xfinity online with NBC SN.
When I try to watch it on Xfinity I see
THIS PROGRAM IS NOT CURRENTLY AVAILABLE with a NBC SN logo.
Because of the logo I think this is something NBC has done, not Comcast.
Calm down because I found the solution you are waiting for (I bet I could get $5 from you right now) OK enough teasing........
After you click on the link below - the page says you must sign in, it is not a big deal to sign in.
Click on the icon in the center of the screen. Then select your service provider - Xfinity.
You are now good to go, the second time I went to the site I did not have to sign in.
Click on this link and bookmark the page for quick access in the future.
http://stream.nbcsports.com/liveextra/
All hockey fans are required to click kudo *********************************** somewhere down here ▼