In this paper, we consider a multi-way relay system with network coding (NC) in multi-spot beam satellite networks. In particular, we focus on multiparty video conferencing via a satellite. Our proposed protocol uses the multicasting routing information and number of video frame packets to generate coded packets. The proposed protocol ensures the reliable transmission of multicasting data for mobile users using the decoding error rate for the random linear network coding batch. To minimize the delay in the link layer, we propose a resource allocation scheme for multiparty video conferencing with NC in satellite communications. For the resource allocation, we use application information acquired by a performance enhancing proxy. The simulation results show that the achievable rate can be increased by the proposed protocol. The proposed protocol can also reduce the number of packet transmissions, resulting in the efficient usage of satellite radio resources. Furthermore, it is shown that the proposed protocol ensures the reliable transmission of multicasting data for mobile users by using resources saved by NC. The average peak signal-to-noise of the video streaming for mobile users is better than that of the conventional system. As a result, the visual quality of video streaming services is improved.