Unfortunately, in my experience, yes. I have an MX4700 bought in Dec 2010. The 3pt acted just as you show on your video. Really annoying and even dangerous in some situations. Dealer tried to work with me and had tractor at shop for almost a month and even had BIG KUBOTA in to look at it. They tried adjusting the 3pt control valve, replaced the 3pt control valve and even tried a similar valve from a different tractor. Nothing improved the situation without causing other problems. The thinking was the output of the hydraulic pump, in gallons per minute is so high, and the volume of the single 3pt cylinder is so low, that it abruptly jerks the hitch up in increments instead of the nice, steady, slow rate you might expect when moving the control lever slowly. Instead of a steady, slow movement, it jerks up, then off, then up, then off.....
I finally installed a Pressure Compensating Flow Control Valve after the loader valve, but before the 3pt control valve. (Fluid goes to loader valve first, then 3pt, then rear remotes if installed.) I can reduce the amount of flow going to the 3pt (with excess dumping back to tank). So by adjusting the flow control valve I reduce the amount of fluid going to 3pt, it moves more slowly and much more smoothly. This also reduces flow to the rear remotes. I use that too when I have my snow blade on the FEL. The power angle is connected to rear remotes. By reducing the flow I can get the angle to change at a nice controlled rate instead of slamming back and forth or needing to be very delicate with the control lever. I really like the mod so far. It is a work around, not a fix, but has been more than sufficient for me. I only spent about $150 total, all bolt on, can be removed if needed. Also, this does not affect 3pt lift capacity, just speed, and if I set the flow control at the max setting none of the fluid bypasses and everything works like stock. The pressure drop across the valve I installed is less than 100psi at all flows and pressures so heat build up, pump wear, etc., should never be a problem.
Search for "Jeff's Homebrew Jerky Hitch" on this forum. I pretty much stole his idea that he used on a different tractor. If you are seriously interested I can give more specific info, pictures, etc....
Best of luck. The flow control valve and hydraulic top link are the best additions I have made to the tractor.
Wxman