This concerto's main appeal, aside from the supreme quality that is to be expected from its composer, is the fact that it's apparently the only extant piece that Mozart ever wrote for the harp. Despite the consequent lack of experience that one would expect considering that, the harp's music seems almost second-nature in its brilliance.
This first movement follows the format expected from the first movement of a classical concerto, with an orchestral introduction presenting the basic material before the soloists, the harp and the flute, enter (1:25) to elaborate on it. Delightfully, due to there being two soloists, not only do they engage in conversation with the orchestra, but also with each other.
Normally, there would be a section near the end (8:20) in which the orchestra remains silent while the soloists play an improvisatory passage called a cadenza. In this video, unfortunately, there is none.
Concerto for Flute, Harp, and Orchestra in C major, K. 299/297c
I. Allegro
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