Dobby, is that you?
"I woke up Sunday morning and saw this on my camera and am trying to figure out...what the heck," Vivian Gomez, who shared the strange footage on Facebook, wrote.
"First I saw the shadow walking from my front door when I saw this thing....has anyone else seen this on their cameras? The other two cameras didn't pick it up for some reason."
The video has over 7 million views thus far and counting.
But not everyone is convinced of its magic, with some speculating it may be doctored.
"This has to be a gag video!" one person commented. "Are people really falling for this?"
But Gomez insisted it's real.
"If anyone tested it or whatever they do, it would confirm it’s not altered," she wrote.
Inside Edition spoke to forensic video analyst Conor McCourt about the video to get his take.
"It could be a lot of things. ... Security videos can cause a ghostly effect," McCourt said, explaining that infrared, which is used to see at night, can be misleading.
"My real suspicion is that it's a child," said McCourt. "... I'm seeing a highly reflective area in the head, it could be ponytails, it could be something else."
McCourt added that he doesn't believe the strange video is a fake. "What I'm seeing is a normal setup for a normal surveillance video. There's nothing to indicate that it's doctored," he said. "... The more probable explanation is that it's just some kind of normal circumstances."
Asked whether the footage could show the house elf, McCourt didn't rule it out.
"We are seeing a lot of similarities between the character Dobby and this ghostly image, so that must be looked at."