youku, letv, ku6 and Tencent video. According to the inquiry of Suzhou Taihu Midi Music Festival, the summary of the live video playback entrance of Suzhou Taihu Midi Music Festival in 217 includes: Youku, LeTV Music, Ku6.com and Tencent Video. Playback is playing from an existing and recorded source, which is what we usually call "playing".