First, let me say I am sorry to hear about your sister, and I hope for a speedy recovery.
About the first speaker, I am guessing that was Jeffrey Miller talking about the 1921 Buffalo All-Americans. BTW, it was not pre-NFL but the beginning of the NFL. The NFL started in 1920, but it was under a different name (APFA). The NFL name started in 1922.
I disagree with Miller's hypothesis that Buffalo was screwed out of the championship in 1921. It is Buffalo's fault, not Halas'. Buffalo had the championship wrapped up but decided to play "exhibition" games against Akron and Chicago (Staleys). Just because one team calls them "exhibition" games does not mean that the league views it the same way. Buffalo lost because:
1) They lost to Chicago in the last game of the season. At the time, the second game counted more than the first in league tie-breakers.
2) There was no official end to the season at the time. The league ends when teams decide to stop playing.
3) Buffalo was stupid to schedule the Akron game the day before the Chicago game. They were beat up, while Chicago was rested. Combine that with the scandal involving the Philadelphia Quakers resulting in the loss of several key players and Buffalo was hurting.