I had this on my first machine too but the ones in the Apple Store were the same. Thought it was designed that way.
I went to an Apple Store to check before asking the replacement. There were more than 4 13" with Touch Bar, none of them had the noisy Touch Id button. Of the 4 15" present, only 1 had a very noisy touch id button, as mine did (or even worse). The other 3 had perfectly silent Touch ID button or were just slightly loose, but much much better then mine anyway. I did not check the keyboards because I did not know of the keyboard issue at the time.
So I got mine replaced (on the phone, because it's a MacBook with US keyboard and I live in Switzerland). They sent me the new machine and it arrived in around 1 week.
They allowed me to keep mine while the other arrived, so at the moment I have both here: the old one with the noisy/loose Touch ID/Power button (but perfect keyboard), the new one with about 3 noisy keys on the keyboard (but with a good Touch ID button, it's not perfect, but much much better than the other one).
I will send the old one back on Tuesday and then phone Apple again and talk about the keyboard of the new one. It's very strange, though. The keys that I have talked about before (F,H,J) are not always noisy. This morning and yesterday, they were doing the exact same sound of the YouTube videos I have seen in this topic. This evening, instead, I can barelly reproduce the problem. They are doing it very slightly or not at all. I am really hoping that the problem goes away by itself before Tuesday, so I don't have to ask another swap.
Do you know why the noisy keys are just noisy sometimes? Does anybody has this problem only intermittently? Has the problem ever gone away for somebody by just using the keyboard for a while? Yes, I have tried to reproduce the problem this evening with a cold MacBook and a very hot MacBook. So, unless the keys get noisy only at some precise temperature, the temperature does not seem to be the only factor for me.