The Video clearly shows two things that were of importance when I was looking to use this type of device.
1, The Base of the Tonearm Lifter fits between the Tonearm Base Plate and TT Chassis without compromising the lifters function.
If the Tonearm Base was Proud of the Plinth Top Surface, would the selected Tonearm Lift fit in this location without being impeded in the positioning.
A Rectangle Shape can be an improved shape, when more options on positioning is needed due to encroachment of other parts belonging to the TT Set Up.
2, The lift is quite controlled and not exuberant, which is very reassuring, when the fragility of the Stylus/Cantilever is considered.