면서 끝나다

end with X happening

The while form names what is going on at the moment something wraps up, so it describes the closing beat: the shot was meant to end on the piano, it would be perfect if it ended with this song playing, it ends with someone saying that line. It also covers how a negotiation or an episode finished, as in it ended with them knocking ten points off. It is descriptive rather than idiomatic.