Hi. I'm using Unity 2019.1.10f and something issue happened with assetbundle. When play videoClip in Assetbundle what has single videoclip, make following error. WindowsVideoMedia error 0x8007007b while reading archive:/CAB-bc229b5592fd286ebef2d66e5f5755d8/CAB-bc229b5592fd286ebef2d66e5f5755d8.resource Context: MFCreateFile Error details: <Empty> Track types: VideoPlayer cannot play clip : E:/Repository/RespectPC/respect/trunk/source/RespectSteamBundler/Assets/BundleDatas/TestVideos/video_01/video01.mp4 Cannot read file. This Single videoclip AssetBundle is working well in unity 2018.4.2f. https://github.com/siz20971/unity_2019_assetbundle_test This is my test project. If assetbundle has video clips more than 2, I can play video very well. (I tested assetbundle that contain 100 more clips and this working properly in Unity 2018 and 2019) Just before create thread, I tested in 2019.1.14f and 2019.2.0f. and, These are makes error too. How could I use single video clip asset bundle?