wouldn't that effectively double the cost of production? It might be cheaper and easier to invest in some spring based dampening. Anyway, even in their video, the vibration is out of control, moving the pipes around and making it look like it won't last too much in real life applications.

You could probably do some kind of damped harmonic balancer with a simple mass on the end of a damped spring tuned for the expected operating range. Still increases cost but not as much.