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In this paper, we propose a multi-level adaptive video streaming approach to mitigate the challenges of video streaming over wireless channels. Scalable video coding, adaptive modulation and channel coding are integrated to maintain continuous playback and acceptable video quality. A probabilistic approach is used to adequately scale video frames to ensure successful delivery within a buffer-state-dependent budget time. Adaptive modulation and channel coding reduce the likelihood of buffer starvation. Moreover, they help reduce the amount of required video scaling, hence, improving the temporal and spatial quality of the received video.