My car occasionally makes a screaming noise. It sounds like it is from the bottom of the car. I opened the hood, the noise is not as loud. But underneath is loud. It doesn't happen all the time. May be twice a month? It only happens when starting the car. If I press the gas pedal, the sounds goes away. When I release gas pedal, sound sometimes comes back. There is no engine light or any kind of warning message. I do oil change regularly. What could it be? Any help would be appreciated.
Link is a video of the noise: