[1][2] Weinstein began to make films as a teenager while attending Earl Haig Secondary School.

[4] This led to teaming up with Barbara Willis Sweete and Niv Fichman to co-found Rhombus Media in 1979.

[8] His films have been broadcast in over 40 countries and he has been the subject of many International film retrospectives including those at the Hot Docs Canadian International Documentary Festival, The Jakarta International Film Festival in Indonesia, Doc Aviv in Israel, MOFFOM (Music on Film-Film on Music) in the Czech Republic, The Look of Sound in Germany, Impara L’Arte in Italy, the Havana Film Festival in Cuba, and a recent tribute at TIFF Bell Lightbox in Toronto.

[15] Weinstein's 2016 documentary The Devil's Horn premiered at the Hot Docs Ted Rogers Cinema.

[17][18] His film Propaganda: The Art of Selling Lies premiered at the Hot Docs Canadian International Documentary Festival in 2019.