视频播放器尚未准备好播放！
我正在尝试从GVR SDK Unity开发视频演示场景，但在每次构建Android演示场景时我都会收到此错误：
UnityEngine.Debug:LogError(Object)
GvrVideoPlayerTexture:Play()
(at Assets/GoogleVR/Scripts/Video/GvrVideoPlayerTexture.cs:484)
GVRSample.AutoPlayVideo:Update()
(at Assets/GoogleVR/Demos/Scripts/VideoDemo/AutoPlayVideo.cs:62)