They may look like sophisticated Hollywood thrillers. But the films of British lawyer Duncan Wiggetts are actually high-budget corporate training videos. WSJ’s Reed Albergotti reports.

Synthesia helps companies like DuPont, Xerox and Spirit Airlines turn dry training manuals into videos with its AI avatars. It’s now valued at $2.1 billion after a new raise.

“Whatever he was doing to me, I thought was normal,” says a human trafficking survivor in a teaser video for a new corporate training video from TAT, a nonprofit dedicated to working with ...