In this video I added the Original Version of Mussorgsky 'Night on the Bare Mountain' to the scene in the Movie Fantasia (1940) which is a Fantastic rendition of this work.
The version of "Night on the Bare Mountain" played in the movie Fantasia, is an arrangement of Rimsky-Korsak and Leopold Stokowski which I also like.

Mussorgsky's original orchestral composition was never played in his lifetime.

This is the recording of Mussorgsky's original score in a performance by the London Philharmonic conducted by David Lloyd-Jones in 1971