VideoLibrary could not be found

I have installed VideoLibrary on Visual Studio and I don't get error from vs. But Unity says: The type or namespace name 'VideoLibrary' could not be found (are you missing a using directive or an assembly reference?) Should I install it on Unity as well somehow? Or what else can fix this? ![alt text][1] [1]: /storage/temp/200344-libvideo.png Here is my vs code with no red line. It works perfectly on Console but with Unity, error pops up