A demo application written in C# with a simple WPF control for loading and showing an animated WebP file. Also includes the original WPF control from MS for showing animated GIF images.
The demo application starts and displays the first WebP image. After five seconds it switches to the second WebP image.
Embed the control inside e.g. a dock panel and set its source property either in designer or code.
<DockPanelBackground="Black"><local:AnimatedWebpElement x:Name="anim"Source="C:\your.webp"/></DockPanel>