If you were the star of every show, would you watch more mobile television? Snapchat is betting that narcissism drives resonance for its new weekly videos that put you and your friends’ customizable ...

After a dark year, Snap Inc. is letting in some light. Evan Spiegel, Snap’s famously private 28-year-old co-founder and chief executive, took to the stage Thursday to deliver a keynote speech and ...