He paid for her education, so it's hardly true that he never helped her out. People on this forum love to rail againt the "spoiled trust-fund" kids, and now your criticizing him because he never gave his family more?
On the other hand, it's understandable that she would participate in a documentary like that, but this response seems extreme.
It's not the money. It's the appalling spectacle of a grandfather telling a granddaughter he never had any feelings for her.