Place it at the end of a short edit, right after a line of dialogue that tries to shut an opinion down. Follow it with a brief applause sting or a confident walk-away visual beat, and keep it as the last audio element before the cut to your outro card.
About this sound
This is a three-second excerpt of Florent Pagny singing the title line from his French song Ma Liberté de penser, delivered as a clear vocal hook over music. It feels defiant and liberating, like a small stand for thinking for yourself, which is why that single sung phrase lands as a statement rather than just a melody.