This is a write-only FTP account ("drop box"), you can't see the files already uploaded, even yours. Best is to prepare a folder on your computer, and upload it at once.
Have your name in the folder name, or create a text file within the folder with your details (name, e-mail address), so that I can easily recognize your files.
If you need an FTP client, try those free applications:
Another easy way to upload files by FTP, if you have Windows XP or later, is to use the integrated Windows Explorer, and type in the address bar:
Then you are asked to enter the username and password (upload / murderci2009):
Finally you get an empty window and are ready to start uploading. Simply drag and drop on there (or copy/paste) a folder from your hard disk, where you prepared all the videos: