That was an interesting video clip, minous.
Something that I rarely, if ever, see mentioned about Yamaha 62 sopranos is the location of the low C# pad-cup. When I first played a silver 62 soprano (at a music store in Vancouver, BC in 1990) I immediately noticed that the low C# pad-cup was on top of the horn's tube. To me, this is a wonderful feature because the moisture tends to run down the underside inside the tube and with the low C# being a closed pad unless opened, the low C# pads are prone to sticking if they are on the underside of the tube.
The one I played was SO nice, that when I arrived back home, I ordered one from a store in the mid-west USA. I ordered a YSS62S ("S" for silverplate). I especially liked the low C# on top of the tube.
When the horn arrived, it had the low C# pad on the underside of the tube, in line with the low B and low Bb pad cups. Most people probably wouldn't have noticed this change, but I did. The horn was a good player and I used it for several years before moving on.
Now, I noticed in Matt's video that the two YSS62 horns he displayed had the low C# pad cups on top of the tube. He also discussed the "Purple Logo" thing. My YSS62S is now in my daughter's possession and I've sent her an e-mail asking about the logo and the pad-cup location (just to confirm my memory of this instrument). I don't recall whether my YSS62S had a purple logo.
What I suspect is that Yamaha changed their design a bit yet still maintained the 62 overall design. The change in the low C's location may have been to incorporate a fully-titlting left-pinky table, but I could be wrong. Maybe if Matt is reading this thread, he could comment. If my daughter reports that I'm becoming addled in my old age, I'll correct what I posted. DAVE