quvi is a commandline tool for parsing video download links. It supports YouTube and other similar video Web sites. libquvi is a library for parsing video download links with a C API. It is written in C and intended to be a cross-platform library.
Open source project that offer summary and download services on this page is a project that carry out their development work on other open source development sites. Their work is linked to this page via a feature called OFI, and their work is not carried out here on OSDN site.