What does it take to build a legacy? Hip-hop artist Cordae tells how he went from mixtape-dropping high school kid to Grammy-nominated music star whose "Hi Level" mindset helps him achieve his dreams.

How hip-hop can make climate action cool | Samir Ibrahim, MyVerse and Kristen Warren

Some of the world's greatest musicians and researchers showcase the power and science of music onstage at the TED conference, TEDx events and partner events around the world. You can also download these and many other videos free on TED.com, with an interactive English transcript and subtitles in up to 80 languages. TED is a nonprofit devoted to Ideas Worth Spreading.