Angel of Attack wrote on Oct 6^th, 2020 at 1:57am:

You can press and test it then....

In the cabin? In the flight deck? In the overhead? It makes no sense.

1. In the cabin nothing happens.
2. The oxygen masks in the flight deck can't be pressed and tested with the "Psh" sound.
3. In the overhead, the PASS OXY button turns ON but that's about it.