SAN FRANCISCO (AP) — Matt Halprin, the global head of trust and safety for YouTube, has a tough job: He oversees the teams that decide what is allowed and what should be prohibited on YouTube.

The Google-owned site has come under fire recently for allowing videos that feature what many find offensive or violent, and for not doing enough to protect kids online. Halprin has to make difficult decisions to craft policies that keep the site as safe as YouTube wants it to be, while balancing what the company considers one of its core tenets: people's free speech.

The Associated Press spoke recently...