Here’s the info on the $20 million donation that got Obama into HLS:
http://www.youtube.com/watch?v=OPzyuiSUiuQ&feature=player_embedded
Prince Al-Waleed bin Talal did indeed make a $20 million donation to Harvard, but it was in 2009.
Obama entered Harvard Law School 21 years earlier.
Notice how the video you linked to didn't point that out.
The two events are unrelated, just like the whole story of Henry Wallace does not have anything directly to do with Obama.
It doesn't even make sense that someone would make a $20 million bet on a 27 year old non-relative.
I have seen the portion of the video with Percy Sutton before. At first it concerned me. But notice that the video is actually making a bunch of claims that Percy Sutton does not state. And so far, Mr. Sutton is the only source for the Khalid al-Mansour connection. Maybe Obama did know Mr. al-Mansour, even as far back as 1988. But it's not entirely clear that Percy Sutton wasn't senile when that interview was conducted.