Delete a finished video export's files (the mp4 and any SRT) now, before the automatic deletion 30 days after the export finished. Every download link for that job stops working at once; the job record stays, so the daily export limit still counts it. Refuses a job that is still rendering (SIMPLER_STUDIO_EXPORT_DELETE_ACTIVE): stop it with video.export_cancel, or follow it to the end with video.export, then delete it. Refuses an unknown job (SIMPLER_STUDIO_EXPORT_JOB_NOT_FOUND): video.export_create returns job ids. Free.