I'd really like to try this out but..

[smygarn]

I created an empty project. Added the lines

"com.unity.demoteam.attributes": "https://github.com/Unity-Technologies/com.unity.demoteam.attributes.git", "com.unity.demoteam.digital-human": "https://github.com/Unity-Technologies/com.unity.demoteam.digital-human.git", "com.unity.demoteam.digital-human.sample": "https://github.com/Unity-Technologies/com.unity.demoteam.digital-human.sample.git",

into manifest.json

I also cloned the packages from the github manually into the assets folder.

Unity Package Manager Error:
Resolved version 1.2.13 does not satisfy requested version 1.2.14

Why does it always need to be issues and errors when trying examples from Unity-Technologies? Usually you need to spend some time debugging and investing time solving errors.