I'm kinda old fashioned, but I'm still trying to figure out when Super Glue became good for use on wood. If I remember correctly, when it first came out on the market it was recommended for non porous materials only, like metal, plastic, glass, etc. I suspect it's current popularity has more to do with saving time than suitability.
Maybe the newer gel type is different. I didn't see the video to know which type he used. I stopped watching Stew Mac vids somewhat after I saw one about filing nut slots in which he recommends Stew Mac's new string lifting tool, which is a plastic doo hickey that you use to lift the string out of the slot. Because, evidently just using your fingers is too inefficient I guess. :dontknow: