This is a Lufi instance. Lufi is a free (as in free speech) file hosting software. The files uploaded on a Lufi instance are encrypted before the upload to the server: the administrator of the server can not see the file’s content. The administrator can only see the file’s name, its size and its mimetype (what kind of file it is: video, text, etc.). You don’t need to register yourself to upload files but be aware that, for legal reasons, your IP address will be stored when you send a file. Don’t panic, this is normally the case for all sites on which you send files.
4 blocks since it contains a few trackers from the parent website: framasoft.