When using encoding.com to generate video for hddn.com, video can be directly uploaded to the FTP service hddn provides. HDDN requires passive FTP mode, so the path will require the URL string to append ?passive=yes.
For example: ftp://username:firstname.lastname@example.org/path/filename.ext?passive=yes
This will solve any issues with upload errors from our service and get the files delivered to hddn.com properly. This also applies to watch folders.