Please keep in mind, you will need to sign in with your Comcast TV username/password to view this (and other) content on XfinityTV. If you have at least one Pac-12 channel as part of your TV package, you should have access to watch all 7 of the Pac-12 Networks including each of the regional channels. If you do have the Pac-12 channel on your TV and run into any difficulties accessing these links, please contact Comcast to have your account id properly setup.
***Note that Comcast has not yet setup access to Pac-12 Networks for iPhone and iPad. You can contact them to request the timing on when it will be setup.