“Looking back over my life, I can’t believe everything that has happened to me,” says Lindsey Stirling in a newly released teaser for “Lindsey Stirling: Brave Enough.” The new documentary from YouTube Red chronicles the Billboard Music Award winner’s personal and professional journey towards becoming a worldwide star.

“I’m a very different person than I was,” Stirling reveals in the spot. “And it’s not because I woke up one morning and changed.” We see footage of the dancer and violinist performing throughout the years, all the way from toddlerhood to adulthood. The teaser suggests that Stirling had to overcome many obstacles to get to where she is. “I know what it feels like to be afraid. I know what it feels like to not believe in myself. I know what it feels like to look in the mirror and hate everything you see,” she admits. But the YouTube sensation goes on to say, “All my trials have really helped me prepare myself to become more brave.”

According to Variety, “the film utilizes in-depth interviews and never-before-seen personal footage as it weaves together stories of tragedy and triumph to tell the tale of Stirling’s musical evolution as she learns to combine electronic music with pop, country, rap, alternative, and rock to develop the unique sound she has become known for today.”

Stirling has over 9.2 million subscribers on YouTube.

“Lindsey is a remarkable talent who stayed true to her vision and found her audience on YouTube,” said Susanne Daniels, Global Head of Original Content, YouTube. “This documentary celebrates her unique sound and showcases the creative force behind the music. She faces life’s challenges with an optimistic spirit that her fans love — and one that is truly inspiring. ”

Co-directed by Emmy Award-winning filmmaker Jane Lipsitz (“Katy Perry: Part of Me”), “Lindsey Stirling: Brave Enough” hits YouTube Red May 17.