[sltkr]

They mention that the "FTP" service includes SFTP, which is file transfer over SSH (not actually related to classic FTP), which is perfectly secure and supported by most FTP clients like Filezilla.

The premium "SSH connection" you mentioned seems to refer to shell access via SSH, which is a separate thing.

[cricalix]

They also support FTP without the SSH transport, and it's not FTPS either. Various IP cameras still support FTP as a way to write files out periodically; I use this to provide a "stream" from a camera (8 seconds per frame because reasons) to the world. Actual streaming via RTSP is also available, but I could never get a stable stream to a video host (like YT or Twitch) from the camera (partially because of a poor quality network connection that can't be upgraded easily). So, FTP + credentials -> walled off directory that's not under the web root -> PHP script in web root -> web browser.