In Maestro, his Oscar-nominated biopic about Leonard Bernstein, director and star Cooper worked with conductor Yannick Nézet-Séguin to find his own rhythm. Originally broadcast Jan. 2, 2024.In Maestro, his Oscar-nominated biopic about Leonard Bernstein, director and star Cooper worked with conductor Yannick Nézet-Séguin to find his own rhythm. Originally broadcast Jan. 2, 2024.