I've done several sensor cleanings on several different Panasonic camera models using the info from YouTube that you mention. The hardest part is finding the tiny tools. Kits sold for working on cellphones, on Amazon, seem to be the best bet.
I Strongly suggest working over a large paper towel so that tiny screws don't bounce off the table if dropped. Cloth also works well, but may have more lint of it's own.
Some newer cameras have tiny springs around the 3 screws which hold the sensor assembly to the lens assembly - don't lose them !!
I have also found it convenient to sketch on a piece of paper towel an outline of the item you are working on, and place the screws and other tiny parts on the sketch in the location the screw came from - some screws are different lengths and may only fit their correct hole.
I gave up on an LX100 because there was a whole second layer of things to remove and it was not my camera (and the spot was 'way over at the side, not seen except at the edge of a wide-angle image).
I have since seen how to get to the LX100 sensor on
https://www.ifixit.com/ and I suggest looking there in addition to the YouTube tutorials.
It's a little frightening, but actually quite easy.
I hope this helps, and I'll be happy to answer any questions you still have.
NOTE: I've never had to do this on a camera of my own, possibly because I always carry my camera in a loose-fitting plastic "Sandwich Bag":
It provides a physical barrier against dust & lint and also a static-electric barrier. I replace the cheap bag when it starts to look "worn" (it doesn't have as much static-electric effect when "worn").
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"Measure wealth not by things you have but by things for which you would not take money"
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