>>3074602>Is there a rough established benchmark where this transition happens?This was most readily used by Egon von Eickstedt, but as a general rule of thumb most racial differences in europe is transitional, most of central europe is a large mixture of all the 5 main european "races" (nordid, alpinid, mediterranid, east europid and dinarid) with different areas having majority populations. Nordids are the majority in northern france, lowland countries, north germany, scandinavia, british isles). Alpinids in most of central europe but especially from east france to northern italy dwindling into the carpathians.
Overall phenotypic considerations are very useful sinc eit is a relatively large amount of traits that differ between populations.
A nordoid spaniard being blonde, blue eyed, light skinned with projective gonions and a robust jaw doesn't randomly become "nordid" because of these traits, look at the individual in the video, his eye area, midface, brow ridge etc are clearly of mediterranoid inspiration (though he likely does represent a recombination of nordid features as he combines multiple features). Getting someone who looks fully scandonordid is exceedingly rare and vice versa. Getting a short genuinely iberian looking individual in Sweden is exceedingly rare, even if a Swede is dark they will usually have characteristically large nordoid features.
Phenotyping is a very useful diagnostic tool, especially when measuring a large amount of features, but we always need to remember that we are just studying racial grouping and not seldom populations made up of mixes between some closely related races (from iberia into southern france to the northwestern tip of italy we have a homogenous group made up of mixes between gracile mediterranids, atlanto mediterranids with some minor nordoid admixture).