EXPLAINER: What's behind the looming Hollywood strike?

A major Hollywood strike could be on the horizon for some 60,000 behind-the-scenes workers in the entertainment industry. Over the weekend, members of the International Alliance of Theatrical Stage Employees (IASTE) overwhelmingly voted in favor of authorizing a nationwide strike for the first time in its history.

Here we look at who is involved, what they're asking for and what's at stake.

WHAT IS THE IATSE?

The International Alliance of Theatrical Stage Employees (or IATSE for short, pronounced eye-AHT’-see) is a 128-year-old union representing over 150,000 artists, craftspeople and technicians in the entertainment industry in the United States and Canada. Comprised of cinematographers, costumers, set designers, script supervisors, hair and makeup artists, animators, stagehands and many, many more, the IATSE represents essentially everyone who works in any form of entertainment (including movies, television, theater, concerts, trade shows and broadcasting) who isn’t an actor, director, producer or screenwriter.

WHY ARE THEY IN THE NEWS?

The three-year contracts that cover about 60,000 of the union’s members — one that primarily covers film and TV production in Los Angeles and Hollywood and another that covers other production hubs including New Mexico and Georgia — expired in July. For the past four months the union has been negotiating new terms with the Alliance of Motion Picture and Television Producers (AMPTP). Those discussions fell apart on Sept. 20. The IATSE says that the AMPTP have failed to address their biggest workplace problems, and membership voted overwhelmingly to give the organization’s president, Matthew D. Loeb, the ability to authorize a strike.

WHAT ARE THE WORKPLACE PROBLEMS?

The IATSE says its members are subjected to excessive working hours,...