It shows the 36-year-old mother talking forcefully to the boy in a hallway in the family's home.
"Why did you lie to me? Does it work to lie to me?" she asks the child.
Beagley asks the boy what happens when he lies.
"I get hot sauce," the crying boy replies.
The video shows Beagley leading the boy into a bathroom, where he sits on the counter next to the sink and she squirts hot sauce in his mouth.
"Don't spit it," she says.
"Are lies supposed to be out of your mouth?" she yells, her arms braced on either side of him.
When he admits to lying, she allows him to spit out the hot sauce.
She then explains to the child that he is going to get in a cold shower for lying about misbehaviour at school: wriggling in his seat and sword-fighting with pencils.
The video did not show the child in the shower, but the boy's screams can be heard.
"Listen to your teacher," she says. "You are to do what you are told."