Change the time of day and the key light after the shoot.
Relight Video is on the roadmap and not switched on yet. Nothing here pretends otherwise.
The closest thing that runs today is Enhance Film.
Upload the film you shot. It comes back restored, stabilized, colour-graded and mastered, with a before/after quality report. Give a reference film and yours takes on its look, faces protected. Want to make something new instead? Describe it and the AI Director plans the shots.