Due to the rise of wireless networked cameras, video surveillance is ubiquitously in many applications. A Wireless Ad-hoc NETwork (WANET)-based video surveillance system could allow clients to access and request video content from a group of cameras. Hence, efficient many-to-many (i.e. from multiple cameras to multiple clients) video streaming is a fundamental issue. Scalable Video Coding (SVC) encodes a video stream into layers (i.e., sub-streams) to support video scalability, which provides a promising solution for efficient video streaming. Existing works generally focused on the Quality-of-Service (QoS) in scalable video streaming, while energy efficiency was not sufficiently studied. Since wireless nodes are always battery powered with limited energy capacity, overusing these nodes may result in some video services stopping early. Therefore, in this paper, we investigate an Energy Efficient Scalable Video Manycast problem (E²SVM) in WANET, which is to achieve batter trade-off between video QoS and energy efficiency. In order to solve the problem, we propose a multitree routing scheme. Simulation results show that the proposed scheme can improve both video QoS and service time.