Assets/Vuforia/Scripts/WireframeBehaviour.cs(41,24): warning CS0618: `UnityEngine.Material.Material(string)' is obsolete: `Creating materials from shader source string will be removed in the future. Use Shader assets instead.'

I am doing a AR aplication for PC and this happen, also It show these messages
Assets/playvideo.cs(8,17): error CS0246: The type or namespace name MovieTexture' could not be found. Are you missing a using directive or an assembly reference? Assets/Vuforia/Scripts/WireframeBehaviour.cs(41,24): warning CS0618: UnityEngine.Material.Material(string)’ is obsolete: `Creating materials from shader source string will be removed in the future. Use Shader assets instead.’

谢谢谢谢谢谢谢谢谢谢谢谢谢谢谢谢