Farrah Fawcett's video diary about her cancer battle turned into documentary

Farrah Fawcett

will tell about her two-and-a-half-year battle with cancer in her own words, in a two-hour documentary NBC News will air on May 15.

The documentary, shot as a video diary with Fawcett's own video recorder, details the former "Charlie's Angels" star's feelings and accounts of her cancer treatments in the United States as well as Germany.

"This film is very personal," Fawcett said during filming. "At the time, I didn't know if anybody would ever see it. But at some point, the footage took on a life of its own and dictated that it be seen."

Also featured in the documentary are Fawcett's longtime companion

Ryan O'Neal Jaclyn Smith Kate Jackson Jim Fawcett

, as well as her team of doctors.

Fawcett's close friend

Alana Stewart