@semurg30 When this happens, there is a simple way to continue with your upload.
First, move the video file or folder containing the multiple files into the folder that your torrent client downloads into by default.
Next, go to the torrent page on the site. Download the .torrent file for the torrent, then open it with your torrent client. If you have placed the file(s) in the right place, it should verify the contents of the torrent, then begin to seed it for you.