Yukihiko,
We are able to play your sample with our own video by pressing play inside Unity 2018.4.7f1
But on the Microsoft Hololens we get
DllNotFoundException: Unable to load DLL 'OpenCvSharpExtern': The specified module could not be found.
To get your project into Hololens we click on "use WebCam" in your project. And then we build to run on the hololens which is x86 and windows universal platform as seen in the screenshot below.
We are not sure what to do. We tried copying your OpenCvSharpExtern dll to various places in the folders that were built before pushing to hololens but still doesnt work.
When we switch the scripting backends in the player settings from IL2CPP to .NET then we get a build error inside Unity when we try to build for Windows Universal
Assets\unity-chan!\Unity-chan! Model\Scripts\SpringManager.cs(72,42): error CS1061: 'Type' does not contain a definition for 'GetField' and no accessible extension method 'GetField' accepting a first argument of type 'Type' could be found (are you missing a using directive or an assembly reference?)



here are the build settings inside Unity in the screenshot below.

then when export to Visual Studio

here is the video from the hololens and the error not working
https://drive.google.com/file/d/1ru2gEQUAV6cQg9XGtjbf5CoKV6tpE_Gf/view