Powerpoint export slide animations as transparent Webm for OBS etc

Something I worked up to create easy to use transparent WebM transparent videos in OBS. Video explainer here YouTube 

Github files:

https://github.com/maxrottersman/powerpoint-to-webm-transparent

Hey Microsoft, you should make Webm an export option that creates a transparent background in Office apps.  I bet many streamers might subscribe to Office 365 if you did this.