07 Prius Ticking Noise (Comes and goes)

When I start the car, engine kicks in. Then ticking noise is coming slowly, after 50 second, it sound disappears but engine is still working, then engine stops. As you can see on the video.

You hear the sound more, from the passenger side wheel, or from the bottom of the car.

When I press gas pedal while parked, sound disappears.

So that noise is not coming from engine components, otherwise it would come all the time when engine is working, but its not.

What do you think?