Use the Non-Profit single song license option for a video that will be displayed to the congregation during a church service. The employee count used should represent the total number of full-time and part-time employees at the Church that is producing the film.
Internal distribution licenses are used for employee-only meetings, such as staff updates and training videos that are only available to church personnel. Use the 'Industrial' distribution for regular services with non-church employees present, and the 'Web' distribution if you're publishing the video online or live streaming the service.