It's unclear who the woman is, though many clips on YouTube — including the one posted above — suggest she is the baby boy's mother. At one point, she tells him in Spanish to "Look!"
Outlets are suggesting it didn't happen in the USA, and it could possibly be from a country where there are a lot of kidnappings, so children are "marked" for identification. Still, hard to understand how a parent could do this!
The Daily Mail reports that the video is believed to have originated in Havana, Cuba.