From sculpture, Michelangelo moved to painting, taking to this visual art all the muscular power of marble, and creating iconic images as in the Sistine Chapel with the creation of Adam, or the athletic powerful Christ of the Judgement, without a beard.
Then, during his last decades of life, his shift to architecture is shown, with the austere Campidoglio Square and St. Peter's, his final masterpiece and, in a sense, his will to mankind.
To read more, a good starting point is Wikipedia's page on Michelangelo.
The documentary was made in 1954, director Mino Loy, production Istituto Nazionale Luce, and is currently in the Archivio Centrale dello Stato. It is shared by Archivio audiovisivo del movimento operaio e democratico (AAMOD) [You Tube channel: AAMODAAMOD].