Hi ruenel,
sorry, but I don’t understand. In Magic Video 14 “Icons as Labels” at 2:30 it says, “All those icons are documented in our online-doc”. So either you’re wrong or the speaker in the video.
Max and WD-Magic is a great help - but right now, it seems that the videos do not match with the reality.
I can’t use these icons, if I have to guess their names (or am limited to the few mentionned in the video). Same thing with videos about css custom properties and css variables, that are mentioned in “Building a custom Typescale” - see my post here: Videos about fonts
You see the video, think “great stuff, let’s try this” - and then you spend lots of times looking for the information / documentation that should be there - but isn’t. So the WD Magic videos are nice to look at, but don’t help that much right now.
Finally: If anyone created those icons and themco developers use them - i can’t imaging that there really is no list for those who use them 
Hope you will either edit the videos or - even better - provide the required infos.
Best regards
Uli