A patheos blogger does some groundwork below the video:
I’ve never read any of Wills’ works, but I’ve read enough of St. Augustine to know that his assertion rings hollow. A quick search on the interwebs reveals a treasure trove of quotes from Augustine’s oeuvre to make Joe Six-Pack pretty comfortable in deciding that I’ll stick with Augustine (and Justin Martyr, Irenaeus, Cyril of Jerusalem, etc.) and ignore the self-deceiving sophistry of Wills. Take a gander at the Augustine citations found on Early Christians on the Holy Eucharist, from the Apologetics Toolkit hosted by a website out of Columbia University. Here is the thought that Wills centered his comments around Augustine upon, assuming the rest of us are ignorant of the breadth of commentary on the subject written by the Doctor of Grace, St. Augustine, Explanations on the Psalms, A.D. 392-418, [98, 9]:
`Unless he shall have eaten My flesh he shall not have eternal life. [John 6:54-55]‘ [Some] understood this foolishly, and thought of it carnally, and supposed that the Lord was going to cut off some parts of His Body to give them … But He instructed them, and said to them: `It is the spirit that gives life; but the flesh profits nothing: the words that I have spoken to you are spirit and life’ [John 6:64]. Understand spiritually what I said. You are not to eat this Body which you see, nor to drink that Blood which which will be poured out by those who will crucify Me. I have commended to you a certain Sacrament; spiritually understood, it will give you life. And even if it is necessary that this be celebrated visibly, it must still be understood invisibly.