Why is Hollywood on strike (and why Succession’s Brian Cox is joining them)?

Production on Hollywood films and hit TV shows has ground to a halt because of the Sag-Aftra strike. Apart from the stars on the picket line, how is this strike different from other labour disputes? Michael Safi speaks to Lois Beckett, a senior reporter with Guardian US, and Brian Cox, who played media boss Logan Roy in the TV series Succession, on why writers and actors can no longer make a living