The documentary “A Brave Heart: The Lizzie Velasquez Story” follows a young woman’s journey from insecure bullying victim to internationally acclaimed motivational speaker and lobbyist. Velasquez — who was born with a syndrome that gave her striking facial features and makes it difficult for her to gain weight — radiates sweetness and humor, no matter the situation. Her story is certainly worthwhile and inspiring. But I wish the film had dug deeper below the surface. My RogerEbert.com review.