I'm confused about air roots!

[Dr. Dave 4u]

Hi all..
seems everyone is an expert on the internet and I am finding conflicting information...so whats new?!!

-I am wondering if one pots up a keiki with long air roots does one put these into the loose breathable medium? If not how do you anchor it in the pot of leave it floating on top of the medium?

-When one repots a mature orchid with air roots do you always leave them out or can some go into the medium?

-If you break an air root when trying to get it into the pot will that root still be viable?

I had read that air roots are different than roots that grow in the medium and some experts/people say they are not good for the other purpose.
Thanks for the help!