The FTP address seems incorrect. I'm unable to connect.
I just updated the extension to fix the error message that pops up in your video, but that is unrelated to this issue. Please reinstall the extension to fix that problem.
I don't think a file is supposed to be created or moved. If you choose an existing file as your body file then you should be able to edit the body directly from that file.
You can add the form bindings from the original page by clicking the plus button from the bindings panel with the email body file open. Can you attach the page you are working on? I can see if it looks correct that way if you are unable to get me working FTP access.