They lead others in worship.
They should understand their role as the significant service that enables those unable to attend worship services in-person to gather virtually with the body of Christ.
Every shot should enable the viewer to engage in worship.
Know what hinders the viewer to engage in worship
It is better to do simple shots well than to do creative/artistic/complex shots poorly.
Know the lead voices and instrumentalists of a song, and focus on covering these people during their moments of leading the song.
Know the arrangement or flow of the song. Get familiar with the length of verses, choruses, and instrumental breaks, and shoot in a rhythm that is cohesive with the flow of the arrangement. Use rehearsal time to make notes of the flow.