I've always found the oxygen mask bits to be the least informative - why not a video that shows the correct deployment (FAs rarely point to the right location from which the bags will come), putting them on (including pulling out the pin bit), and any aural or other clues that it is working ("please note, the bag does not inflate").
And when I say a video - I mean a realistic video with conditions in the airplane, while simulated, like they would be in an explosive depressurisation. (or is this a rare event itself?)