CanyonWalker said
.....To me, that rhythm is more of a sequence of a dotted eighth with a 16th, per beat, because 2 tied triplet eighth notes followed by a normal triplet doesn't add up to one beat and hence 4 beats in 4/4 time since one triplet is one beat.  Ah well that doesn't matter; it's the feel that matters and that's why I needed the video.  I believe the effect is more subtle than tied triplets or a strictly dotted rhythm. 

  LOL - too much analyses - but - I think you got it precisely.   

  I don't play much of that style, and when I do try, it's for educational / inspirational purposes, but the same applies exactly to "fiddle" tunes....  it's the "feel".   Folks often misunderstand me because I say I "play by ear" - that doesn't mean that sheet is not important - of course it is - and it is ALWAYS a "starter-for-ten" (unless it's a total improv).   Or, unless you are part of an orchestra or ensemble where you MUST play largely in time - if you are soloing or leading - it is "what YOU BRING to it" to make it your own - listen to me - as if I know - well I DO know - but I'm still a beginner on fiddle and still working to "own it"... LOL

  There's a whole heap of stuff on "basicmusictheory".com - this is not precisely what you were asking - but gives a view of the chords "related" to that scale - https://www.basicmusictheory.c.....iad-chords and is a great site to research....