The proliferation of mobile devices such as smartphones and tablet PCs have accelerated the online video consumption over a wireless network. To guarantee the stable HD video streaming, the steady and reliable wireless mesh is necessary to satisfy QoS of real-time video services. In this paper, we propose a reliable video delivery system with the split-layer SVC encoding and real-time adaptive interface selection over LTE and WiFi links. Through the adaptive interface selection, the system aims to ensure the maximizing video quality which the bandwidth of LTE/WiFi accommodates. Additionally, we offer an optimization scheme for mobile users' cost-effectiveness by controlling the interface selection policies based on users' remaining daily or monthly LTE data. We evaluate the proposed system in an emulated and a real-world heterogeneous wireless network environments. The results show that the proposed system not only achieves to guarantee the highest quality of video frames via WiFi and LTE simultaneous connection, but also efficiently saves LTE data consumption for cost-effectiveness to the mobile client.