From their site: This API helps you put FilesTube Search in your web pages. FilesTube.com is a search engine designed to search files in various file sharing and uploading sites. FilesTube finds files matching your search criteria among files seen recently in uploading sites by our search spider.
Our API directory now includes 54 file sharing APIs. The newest is the Gigatribe API. The most popular, in terms of mashups, is the FilesTube API. We list 1 FilesTube mashups. Below you'll find some more stats from the directory, including the entire list of file sharing APIs.