DJ, musician and record producer Mark Ronson talks about his life in music. Ronson’s hit song ‘Uptown Funk’ featuring Bruno Mars spent 14 weeks at #1 on Billboard’s ‘Hot 100’ chart. Ronson had his first big success producing Amy Winehouse and has produced recordings by Paul McCartney, Adele, Christina Aguilera, Nas, and Lily Allen. Also, tech contributor Alexis Madrigal reflects on YouTube’s first decade.