It stands for File Transfer Protocol, and deals with FTP clients like Filezilla as a way to upload content to your account. FTP clients are external programs which allow you to connect to a web service, like DaCast, using login details that include a:
This is the suggested method for uploading files around or over 1.5 GB in size. If you need help on using this feature over DaCast, please reference our VOD walkthrough.
If you need help to upload via FTP, you can follow this tutorial.