Copywrite for video music
Does anyone know how to find out if a piece of music is copywrited? I would like to use a piece called "Also sprach Zarathustra" composed in 1896 by Richard Strauss (Theme music from 2001 Space Odyssey). Because this piece is so old, does it automatically mean it's free to use? The version I downloaded was played by some orchestra several years ago. Who has the song's writes in this case, the composer or the orchestra? How will YouTube know which orchestra played the song?
Thanks.
