Hi Gareth, at that milage the shocks are probably at the end of there service life if you take into account the tyre wear in the video, the shocks are oil over gas and don't have to leak to be knackered which is why springs break as they are doing most of the work and the damper unit is just following the spring about like a bored husband in a dress shop, I have always changed the shocks and springs on my cabs at around 120k and noticed a spectacular improvement in handling and tyre wear, example being my last MK4 Mondeo estate after switching to heavy duty shocks [Bilstein] and Kilen springs the ride was as sharp as a razor and stayed that way until I sold the car another 2000k later, I would also like to point out badly worn dampers increase your stopping distance by twenty feet from any given speed as the tyre is trying to grip with no gradual compression from the damper and spring, saw this at a trade show I attended and it made pretty grim viewing as you can have the best discs and pads available but if the rest is knackered the end result is the same, longer to stop.
Steve.