The application of streaming media technology in university online physical education support systems is an area worth exploring. This article begins by analyzing the encoding and transmission characteristics of streaming media itself, as well as the requirements and key performance indicators that educational support systems need to meet, serving as the theoretical foundation for system development. Based on this foundation, a streaming media platform and interactive client based on the C/S architecture are employed, focusing on key technical points such as adaptive streaming and UDP short connections to achieve efficient, low-latency streaming media transmission and interactive bullet-screen functionality. To validate the effectiveness of this solution, a test environment with servers, routers, and multiple clients was set up to assess system performance. The results show that even under severe network conditions with bandwidth as low as 3 Mbps and 20% jitter, the system keeps the maximum delay controlled within 550 ms, meeting the requirements for smooth playback. This demonstrates the effectiveness of the proposed solution and establishes a solid technical foundation for the networked and intelligent development of physical education support systems.