Minimal data for a reasonable hyperalignment or shared response model

Does anyone know how much film-viewing data are necessary to fit a good functional alignment model, both in terms of number of subjects and amount of data per subject?

I’m specifically interested in fitting a shared response model or running hyperalignment on the film-viewing task in the Queenland Twin Adolescent Brain dataset. The task is 5 minutes and 11 seconds long, with a TR of 0.8, and there are ~300 subjects with the task.