Ok I just watched his whole series on the page of lies (9 videos, the last being hilarious).

I am convinced by it.  And I think you are right, I think blood will matter and parentage will not.

And given that Daenerys is of Dragonstone, not Targaryen, why shouldn't Jon Snow be of the North and also not Targaryen?

They both have the magic of their region in them.  And together they are ice and fire.

But neither of them is the rightful heir (if Jon's father is not Rhaegar, or if Young Griff is real)... that all these games of thrones are just the folly of man, blinding himself to what is real, what really matters (character, genetics), versus what is formally declared to matter (next in line to the throne based on dumb rules).

Thanks for the pointer, and I think this fits well with my preferred X+L=J theory. 

 Interesting points. Not sure we'll ever get our answers. Im holding onto a thread of hope that TWOW gets finished. No chance for a Dream of Spring. 

 Yeah me too, just a thread.