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Just have to ask - whats with the latex/nitrile gloves?
I can't speak for him but after many years of exposing my hands to oil, gasoline, and the many solvents that go along with the hobby of working on old cars, trucks, motorcycles and guns, my fingers have a strange, undiagnosed(been to dermatologists) skin condition that is unsightly and painful. Getting as little of this stuff on my hands as possible helps out.
In the past I used the nitrile gloves but I've now found out the heavy textured latex are better for me. I'm not talking about the thin latex gloves that are almost useless for working on cars. The ones I've been using are not like the medical type gloves, they are much thicker and as in the description, are textured on the outside. I've tried these types:latex, nitrile, latex/nitrile, and textured latex. The latter has worked out the best for me. They also are the most expensive of the types I've tried but I am able to put on one pair of gloves and not have them tear apart during a single work session. I often am able to reuse them another time or two.
On the video in question, I can imagine that an engine with mounts that are absorbing more of the vibration than others are would appear to vibrate more while less is being transmitted to the chassis.
Ken