“Modern movies begin here,” Roger Ebert has written, adding that “no debut film since Citizen Kane ... has been as influential.” The incomparable cool of Jean-Paul Belmondo, the vulnerable toughness of Jean Seberg, and the brashness of director Jean-Luc Godard helped launch the French New Wave. On its 50th birthday, Breathless remains fresh and exciting, although its revolutionary approach has long since been absorbed into the mainstream, and the years do show on it a bit. Not rated. 90 minutes. In French with subtitles. The Screen, Santa Fe. (Jonathan Richards) See Screen Gems, Page 84.