The footage has social media in overdrive speculating what the creature is.
Mom Vivian Gomez, who lives in La Junta, Colorado, told Inside Edition that she's "not sure" what it is.
Asked whether it could be her 9-year-old son Bobby, Gomez replied, "No ... I wouldn't let him out at dark by himself."
Kelsey Eddy, who lives next door, said there are no other kids in the neighborhood who look like the figure in the video.
"I've never seen something like that before in my life," she said.
Gomez thinks the creature went off into the field across the street, the perfect place to hide.
"That goes for quite a way," she said. "We have coyotes over there and cattle."
She added: "I don't know if it ever will be solved."