Complex sentence: The music video, set at the famed Apollo Theater in New York City, features Houston getting ready to perform, but reflecting about performing in her past, showing at the end the young Houston merging into the present Houston, and delivering a spectacular performance.
Split into simpler sentences: The music video, set at the Apollo Theater in New York City, depicts Houston getting ready to go on stage, and reflecting about past performances. It ends with the young Houston merging into the present Houston, and delivering a spectacular performance.