Here is a mini course for all your PNGTuber needs!
PNGtubing is when you want to use png's instead of using Live2d to create a virtual avatar that is less GPU taxing on your computer and easier to create.
They do not need to be rigged to implement some simple animations and can help add extra life to a video or livestream.
This tutorial uses Clipstudio software for making the art and veadotube mini software for the pngtuber animation setup:
https://olmewe.itch.io/veadotube-mini
For livestreaming and video recording it is streamlabs software being used:
https://streamlabs.com/
Feel free to ask questions or follow and subscribe for more animation and tech content in the future
Thank you (❁´◡`❁)