They're going to price themselves out of the market. When their prices get high enough, it will make people willing to hunt down illegal streaming and download services. the league may not like that. Big corporations may not like it, but that's the way it is, and they won't be able to stop every illegal service.
Not that I'm advocating illegally obtaining these broadcasts. I'm just stating the truth. The public is not a bottomless money pit. There's a limit to what people are willing to pay for football. Some people will just be like, "Screw it. I'll live without it and just watch the recaps on Youtube." Other people will find the material illegally. That may not be what people are supposed to do, but it will happen.
If the league, and Youtube, want people to pay for a service, they need to price it within what the market will bear. If they don't, it will end up hurting their bottom line. It's just a fact, and all the attempts in the world to shut down illegal steams will not change that.