Lizzie Velasquez, who suffers from an extremely rare syndrome, recently debuted her documentary, "A Brave Heart: The Lizzie Velasquez Story," at the South by Southwest music and film festival in Austin, Texas, the Washington Post reports.

The documentary shares the story about Vasquez's previously undiagnosed syndrome, and how she overcame the bullying she experienced over her physical appearance.

MTV reports that Velasquez's rare syndrome, which has now been labeled Marfan syndrome, prohibits her from gaining weight and has caused a deformity to her physical appearance. The 26-year-old Texas native is also blind in her right eye and visually impaired in her left.

And though Velasquez embraced her syndrome growing up, she began experiencing self doubt and self consciousness when she came across a YouTube video that named her "The World's Ugliest Woman," MTV reports.

It was at that point that Valesquez chose to speak out about her syndrome and take action in ending cyberbullying via her documentary, her YouTube channel, and her critically acclaimed, TED Talk appearance, says MTV.

When asked what she would say to the person who posted the "Ugliest Woman" YouTube video, Velasquez surprisingly replied, "Thank you."

"I would absolutely say thank you," Velasquez said about the video. "Absolutely. Because if I never found that video, it wouldn't have been the spark to change everything. I think I'd still be in a way helping people but I don't know if it not the same way as now. I wouldn't be mad. I'd be so grateful, which sounds so crazy. It changed everything."

The Washington Post reports that since taking action against bullying, Velasquez has garnered over 300,000 subscribers on YouTube and her TED Talk appearance has received over 7 million views.

"I'm not sure what it was about the TED Talk or what I said in it, but it changed everything," she told USA Today.

"I knew this is my purpose. This is what I'm meant to do for the rest of my life because I like to think that I'm not only telling my story, I'm telling everyone's story."