After production the video does not exist.
This can occur if you are saving your produced files to a cloud storage folder, network drive, or external device. We also sometimes see it on folders which are being monitored by backup software or synced with cloud services or another disk. We recommend saving to a local disk/folder that is not being synced and then copying your produced file to your final destination.
This article has more information about cloud storage and TechSmith products.