The Venturi Effect is a direct result of Bernoulli's Principle. The increase of fluid velocity caused by restriction of flow like capping a water hose with your thumb. So yes, it's both.This is not Bernoulli's Principle at all. I also don't think it is the Venturi Effect.
"The Venturi effect (Giovanni Battista Venturi, 1797) is a direct consequence of the Bernoulli principle. It describes the effect by which a constriction to fluid flow through a tube causes the velocity of the fluid to increase and therefore the pressure to decrease."