During the first part of the video the orchestra plays a movement of the piece until Ashkenazy stops to give for making some corrections about tempo, dynamics, rhythm and character.
Ashkenazy insists on the tempo and its relation to the character of the movement, that which is a march. The performance in general must be more active, however, but an energic character does not mean to lose the control or even to rush the tempo. He also corrects some passages of the trumpet parts.