A light observation on where each clone prefers to be:
Daryl mostly takes up the far-left angle to be badass ("Sixteen Tons", "You Don't Mess Around with Jim"... "God Rest Ye Merry Gentlemen"), so if somebody is spooking you from behind with a Crosby/Armstrong/heron-like voice, that's him. Occasionally takes the right, tho, to be the more grounded one per se ("Folsom Prison Blues", "Ghost Riders in the Sky", "Unshaken"). Noncanonically far-left ("Far Over Misty Mountains Cold") or far-right ("I See Fire", "Last Goodbye") Thorin. As a joke he's also the far left narrator for "Monster Mash"... as an OOC trick he's the far right narrator of "Big Bad John".
Jeoph (the highest one to me still), is usually on the right, mostly near Geoff ("You Don't Mess Around With Jim", "Blackbird", "Man of Constant Sorrow" near Daryl) or far away from him ("Sixteen Tons", "Folsom Prison Blues", "Unshaken" [Daryl again], "God Rest Ye Merry Gentlemen"). Even as one of the Dwarven brethren he's on the nearby right ("Far Over Misty Mountains Cold", "I See Fire"). As a trick he's on a nearby left for "Shenandoah".
Jeff is the most versatile with directions: far left ("Folsom Prison", "I See Fire"), nearby left ("Unshaken"), far right ("Far Over Misty Mountains Cold", "White Christmas").
Goff also favors the left side when it isn't taken by Jeoph. Anywhere but right (far left in "Unshaken", near left in "God Rest Ye Merry Gentlemen", "You Don't Mess Around with Jim", "Far Over Misty Mountains Cold", "I See Fire").
A bit confused as of now... should be in bed. Hope I got at least some of this right...✌
Oooooh, do any of the Clones have a higher likelihood of having a certain relative positioning in videos? Boy, this is the exact kind of random hyperspecific question I was born to answer! 😁
I had a bit of a think and decided that the best way to assess this would be through making up a basic table/spreadsheet in Excel. So I did! But some notes on the data first:
I stuck to videos where I could find any sort of confirmation of who's who in the video, even if it came from a secondary source, like a comment on a reaction video for Till Then. I'm also not sure if three of the characters in Rains Of Castamere correspond to three of the clones, but I'm just playing it safe and leaving it out of the dataset
Technically Daryl wasn't first officially introduced (or at least named) until Ghost Riders, and Kili in Misty Mountains is probably more likely to actually just be Main Geoff, but I'll take all the data I can get, and so I'm just matching up the dwarves' standard assigned vocal roles/voice types to those of the Geoff Clones (and again, Jeoph is in fact second-lowest).
Now then, as for the data!
(I figured colour-coding would just make it easier to visualise.)
By and large, you were mostly pretty spot-on! The two clones with the most consistency in their positionings are Goff, who's usually on the left end (or second from the left in White Christmas, with just one exception of being second from the right in Ghost Riders), and Jeoph, who's on the right side more often than not, and mainly on the right end specifically. Jeff, meanwhile, has a slightly higher frequency of being on the right side, and Daryl has a slightly higher frequency of being on the left side, but in both cases it's a difference of like one video, and that's with the assumption that each dwarf consistently corresponds to a specific Clone.
(Also, I don't think I ever realised that the lineup order of Song Of Durin matches the lineup order of Unshaken! Plus the fact that I See Fire is a mirror image of Misty Mountains Cold, from a positionings standpoint).
Hope my answer was what you were looking for! :)