Memory leak when playing multiple video's after each other without closing the app.

[JohannesKauffmann]

The app uses about twice or three times as much memory after playing multiple video's in succession without closing the app.
After some research, there are multiple things we can do:

• Unsubscribe from event handlers
• Dispose the Media as per the LibVLCSharp.UWP sample
• Stop using MVVM Light as it is no longer maintained and has leaks as well.

It might also have something to do with this issue.