You play the movie with
See the Karma User Manual section on commonfeatures and movies.
By the way, the program kview can also be used to make a movie of a data cube, where the motion is in the Z-axis (similar as tvmovie in aips or with gids in gipsy). Just load the data cube as it were a xray movie and play it.
kview also has two buttons to step frame for frame through the movie.