That's essentially what the video is about, there are two (technically three) types of popcorn buttons, ones that use a humidity sensor, ones that have a pre set time based on average popping time of bags of certain sizes, (and super fancy ones that have the humidity sensor as well as a sound sensor that listens for the "x number of seconds between pops" sound sensor)
I have a really cheap microwave. I doubt it has a humidity sensor. And it puts 3 minutes on the clock as soon as you hit the button, so the time isn't dynamic at all