This is What's Trending Today.

Millions of people are watching a video of a 5-year-old girl from the U.S. state of Colorado completing an obstacle course at her home.

Gavin MacCall and his daughter Lylah are fans of the popular television show "American Ninja Warrior."

On the show, competitors try to complete obstacle courses as fast as possible.

They must climb ladders, use ropes to swing across pools of water and run to the top of steep, curved walls.

In 2015, when Lylah was 4, her father designed her first obstacle course. Lylah started in one part of the house. She worked her way across pieces of furniture, walked on bridges of narrow boards, climbed kitchen counters and traveled over waste containers to make it to the finish.

Gavin MacCall provided the narration and crowd noises, just like on television. At one point, the family's cat became an obstacle!

Earlier this year, MacCall posted new images on Facebook that suggested a new project. He was building another obstacle course, but this time, it was outside of the house.

Late last week MacCall posted another video. In it, Lylah wears a t-shirt that reads "Girls are superstars." She raises her fist over her head before starting the course.

The course is tough. It even includes a zip line on which Lylah glides over of a line of her toys.

The video lasts a little more than two minutes. Lyla is calm and confident throughout. Gavin MacCall provides commentary and a recording of crowd noise.

The camera sometimes shows an audience of toys.

Lylah runs up a steep, curved wall -- the final obstacle. She hits the buzzer to complete the event. Lylah is victorious! The crowd roars.

Gavin MacCall's video has had more than 60 million views.

And that's What's Trending Today.

I'm Dan Friedell.

Dan Friedell wrote this story for Learning English. Caty Weaver was the editor.