From a dark conference hall in Lille, Italy’s Amalfi Coast was given some major screen time as Prime Video used Series Mania to promote “Costiera,” the upcoming action drama series starring Jesse Williams.

The audience at the showcase were shown an exclusive sun-soaked teaser of the show — in which Williams plays a fixer at a luxury hotel tasked with finding the owner’s daughter — before it launches on the streaming platform later this year.

Speaking on stage, Nicole Morganti, Prime Video’s head of originals for Southern Europe, said that while “Costiera” had an American director in Adam Bernstein and an American lead,...