So far all the videos I've seen are about adjacent string-crossing.
Even in Simon Fischer's Basics his non-adjacent string exercises begin with détaché bowing from G to A and G to E without discussing how. And is there such a thing as legato bowing between non adjacent strings?
Has Fiddlerman done a video on this?
There is one tune I play, Jacky Tar, that jumps from the D string to the E string, and you are supposed to slide your finger across the A string to mute it a bit, so it becomes kind of a grace note slur along the way. Not sure how common that is?
World's Okayest Fiddler