Grizpsych,
University of Oregon doesn't have a direct streaming option. Sling TV and Fubo TV carry the Pac 12 channels in my area of Texas. Both have a 7 day trial periods. Sling is charging $25/month + $5 for the Pac 12 channel and Fubo is charging $54.99/month + $8.99 for the PAC 12 channel. Otherwise, one has to be a cable TV subscriber and this subscriber has to carry the PAC channel - like Dish, Spectrum, etc. Most of Griznation will have a problem viewing this game. Like you said DirectTV doesn't carry the PAC 12 channel as yet. I was told Direct TV may carry it by start of 2019 FB season. It is being beta tested as I write this post.
I plan on using www.attwatchtv.com again this year. Their Audience channel carried all of last year's Griz (Root) games. It costs $15/month and one doesn't need a 2 year contract. It is month-to-month. This option doesn't have ESPN or ESPN2 or the Pac 12 channels. Video and audio was excellent.
If this doesn't work I'll try www.DirectTVNow.com. This also carries the Audience channel which may also have Root Sports/Griz games. This program has ESPN and ESPN2. It costs $50/month and has $15 off for the first 2 months. It doesn't carry Pac 12. Again, one doesn't need to have a year or multi-year contract for use.
Finally, I'll use Pluto and/or Griz All Access when available.
If anyone has any better options please let us out of staters know about them.