As it has been mentioned, you cannot do it (synch flawlessly). If it was possible then I would know by now and share that info with you. Here are you options point blank:
1. Watch it and take it all in on the tube (Beth / Announcers and all)
2. Listen to the Husker broadcast ("tunein" via computer or radio)
3. Listen to it and glance at the game for a replay of what you just heard (but the "replay" is the actual play being shown in normal game time speed)
I know you are just looking to see if it can be done to enjoy it without ESPN2 announcers. It really depends on what you want to get from the experience. Do you want to get emotionally invested? Do you want to live and die by each play? Do you want to watch the game while talking to friends about the play(s) that is happening or just happened? Possibly missing something but knowing you have a slow-mo replay (sometimes)?
Just depends on how you want to absorb a Husker game. For me, sometimes I will listen to the game over the internet ("tunein") to get the best feel of it (as long as it is not a night game against a quality opponent). The mind can paint a picture from the broadcast while getting caught up emotionally within the call. But, after hearing the play you can always pivot and turn towards the TV and catch it happens on "live TV".
Nothing is better than the sounds of a Husker broadcast with an analyst (Matt Davison) and Husker sideline reporter giving you the game, insights, analyst and sounds. And, nothing is better than watching it with your own eyes. In other words, you can watch it as intended and possibly feel sleepy with Beth, flipping channels at times, or you can listen with headphones in stereo to the broadcast and get caught up on a play while glancing back to the TV to see if what you heard matches the call. I've enjoyed it on TV and on radio (or internet radio). Again, the biggest thing is how much insight you want to gain from it (nothing beats the Husker broadcast)