У вашего броузера проблема в совместимости с HTML5
Sample code: https://github.com/nhkhanh/WPF-MVVM-Sample
0:28 Use Nuget to add reference to prism.wpf
0:45 Add Views and ViewModels folder
1:02 Move MainWindow.xaml to Views
1:10 Correct namespace
2:00 Install Prism.Wpf from NuGet
2:36 Change StartupUri to match MainWindow.xaml in Views folder
4:53 Create MainWindowViewModel class
8:44 Manual event/delegate setup without using Prism libary
20:11 Prism MVVM way
21:59 Create Data Binding
24:39 XML namespace declaration
24:57 Enable AutoWireViewModel
27:28 Edit ViewModel and Data Binding for X and Y
30:50 Handle event click way
36:26 MVVM Command Data Binding
39:42 Command Data Binding to Button
Reference:
https://msdn.microsoft.com/en-us/library/gg405484(v=pandp.40).aspx
http://brianlagunas.com/getting-started-prisms-new-viewmodellocator/