OK, there is something weird here. The first few times I heard a combination of the two words, with "Yanny" actually being slightly more emphasized. The Yanny sound faded with a few more repetitions, and now all I hear is "Laurel". I cannot make the Yanny sound appear again.
The Yanny sound was quite prevalent when I could hear it, even overlayed over the other word. Not my imagination. I have to believe this is some kind of computer trickery.
Generally when something this inane becomes popular (goes viral) it is either a really slow news day, or there is some significant event the government does not want us to find out about and is intentionally distracting us from it with this inane garbage.
That one is an easy one. If you look at the picture up close it's Albert Einstein, but when you move your head farther away it becomes Marilyn Monroe. It's not a vision test, unlike the audio illusion (unless you changed the sound on your computer) you can make yourself see one or the other.