Same word as voiceover:
annotation, appreciation, comment, consideration, criticism, critique, description, discourse, exegesis, explanation, exposition, gloss, narration, notes, obiter dictum, observation, remark, review, treatise, voice-over
annotation, appreciation, comment, consideration, criticism, critique, description, discourse, exegesis, explanation, exposition, gloss, narration, notes, obiter dictum, observation, remark, review, treatise, voice-over