Only noobs don't have the official [Microsoft Windows -
WebP Image Extension](https://apps.microsoft.com/detail/9pg2dk419drg)
> The WebP Image Extension will enable you to view WebP images in the Windows File Explorer, Photos and other Windows apps.

>>518533646
mp4 and webm (and mkv etc) are just containers of "multimedia streams", which can include video, audio, subtitles, etc. The container doesn't make much difference, as the "encoded video data" is ultimately the majority of the files-size.