Why Do the Planets Orbit in the Same Plane?

The video explains why planets orbit the sun in a flat plane, tracing back to the solar system's formation from a spinning gas cloud. This process, driven by gravity and angular momentum, led to a disk shape where planets formed. Most planets orbit in the same plane, but some objects have inclined orbits due to gravitational influences from larger planets. This phenomenon is common in other star systems as well.

What is the reason that all the planets in our solar system orbit in a flat plane?

What role does angular momentum play in the formation of the solar system?

How did the initial spherical cloud of gas and dust lead to the formation of a disk shape in the solar system?

Why do some objects in the solar system have inclined or angled orbits?

In what ways is the orbiting behavior of planets in our solar system considered normal compared to other star systems?