Yesterday I pulled the driver's armrest switchgear because the front passenger window "up" switch was intermittent then inoperative. I didn't use tootpaste because every one of my contacts looked a lot better than the ones in the video. I just swabbed them down with alcohol and all is good.
I am doing this right now. I was freaking out because I thought I lost a white plunger. Now I see in your video yours is missing as well. The is the rocker switch for the rear window locks and only moves to one side so that makes sends now. PHEW!!!
My plunger shafts are all also filthy. Scrubbing those up as well. I used a lint free rag dipped in warm soapy water for these.
All my brass contacts look surprisingly clean as a whistle. Except for the last pair at the rear which are for the door locks, which IS the one giving me issues. Curious as to why it's just those two. Because they are at the rear of the switch? Higher current draw? Or because they are hardly ever used? Strange but interesting to learn. I DO notice just a little bit of crud build up on the top side of the white rubber brass contact holder. I am wondering because if this is the rear of the switch and any rain water got in there over the years causing this issue. That is my hunch. Scrubbed that as well with the warm water rag and light blow gun action.