You mentioned vibration at a certain speed, but usually vibrations are engine related, and thus RPM related, rather than speed.
Speed related vibration ofrlten is called osscilation, or wobble, as it usually has to do with imbalanced tires, and/or the suspension making the experience of a wobbly, uneven road, worse.
I know sometimes I ride certain roads, and it feels like my wheel is out of alignment, because the road had been paved in a wavy surface, rather than a straight road.
Nothing much you can do, other than balance your tires.
Suspension issues are usually on older, worn suspensions, or broken ones.
I'm more interested in engine vibrations.
From the videos, I am pleasantly surprised to see that the dash cams give a quite clear image; meaning very little vibration compared to the Honda CB/CBR 300/500 F/X/R series.
Any engine has a certain Rpm range where they vibrate the bike more than on any other rpm range.
Which RPM range makes the R3 vibrate more?