That!!!^^^
Here is another look at this (with the dorian b2; i.e., the second mode of the melodic minor scale) and even Beato calls it at some point “the key of A dorian b2” - so, there you have it.
The other take home messages from this video (my “aha” moments) are that: 1) yes, these modes can be the tonic of a song (or a melody, as I speculated further above); and 2) if you encounter any of the chords he mentioned and want to improvise, you can use the notes of the A dorian b2 scale 
So, it is often about knowing which scales to use to improvise on certain chords!
I know! It was a bit tongue-in-cheek what I said, but it is kind of sad how most music that does not adhere to the popular melodic framework gets easily pushed aside as “too far out there”. But, yeah, some stuff is really out there 