A possible summary is:
An Uber driver picks up a passenger named Carly and tells her that he has a YouTube channel with 13,000 subscribers. He convinces her to do a carpool karaoke video with him, where they sing various songs from musicals and improvise their own lyrics. He also reveals that he was pranking her and recording her the whole time. Carly is shocked but amused by his antics. He ends the video by promoting his channel and telling his viewers to watch his previous video.
Here are the key facts extracted from the text:
1. The Uber driver is also a YouTube personality with 13,000 subscribers.
2. The passenger, Carly, is a musical theater performer.
3. Carly is a vegan, and her best friend is also vegan.
4. The Uber driver and Carly sing several songs together, including "Defying Gravity" from Wicked and "Omigod You Guys" from Legally Blonde.
5. They also engage in an improvised conversation and sing a song about a mother-daughter relationship.
6. The Uber driver reveals that the entire ride was a prank and that she was recording Carly the entire time.
7. Despite the prank, Carly takes it well and thanks the Uber driver for the fun experience.
8. The Uber driver asks Carly to promote her YouTube channel at the end of the ride.
9. The passenger's destination is a vegan restaurant where she is meeting a friend for lunch.
10. The Uber driver has equipment in the trunk of her car to record the carpool karaoke session.
11. Carly and the Uber driver exchange contact information and discuss possibly collaborating on a musical project in the future.