First of all, this paper summarizes the key technical directions of satellite-ground deep integration, new spectrum communication, distributed cooperative MIMO and intelligent communication that may be involved in the future 6G, and focuses on the space-ground integrated network (SGIN) based on satellite-ground deep integration; Then, aiming at the two typical network topology architectures that may exist. This paper is devoted to the research on the architecture and development of the video teaching system based on streaming media technology in modern distance education, providing learners with a "learner-centered" networked learning environment. Based on the educational technology theory of streaming media technology and system development, the whole system development process from system requirements analysis to system design, to the production and release of streaming media data, and the production and release of web pages is described in detail.