Flat directory structure

Please add an option for flat directory structure where all videos and thumbnails go directly into the archive folder. This would make it easier to interact with the archive using media center apps like Kodi or just browsing it using file explorer. For the latter to make it seamless it might make sense to: - name video files `<title> [<id>].<ext>` - set the file creation and/or modification dates to the publication date of the video