my elder G4 Powerbook 17" was delaminating the trackpad...
clicking on the trackpad was increasingly going down, into the computer - over most of the length of the trackpad "click strip". I was getting afraid of "going through the floor" on the next click.
The repair went well. I took my time and learned a lot about how to layout parts when disassembling and then the re-assembly.
On the videos, I think it might be helpful to have the NEXT buttom on top as well. sometimes I would scroll the "steps" on the one screen and I'll find myself at the top... now I've got to scroll all the way down to "go forward" to the next page of steps. Slightly annoying.