If you saw this in a technical context, it might refer to a Solid (Social Linked Data) pod or a secure session log.
Files from P2P or dubious streaming sites with such naming patterns frequently contain: ftav001rmjavhdtoday021750 min top
This signals the quality of the media (High Definition) and potentially the date or "current" status of the upload. If you saw this in a technical context,
This specific file ID is commonly found on JAV-focused streaming platforms and enthusiast forums. ftav001rmjavhdtoday021750 min top