The fidget spinner begins at rest, with the net torque equal to 0, resulting in the angular acceleration also being 0.
However, as soon as my finger comes in contact with the outer edge of the spinner, my finger exerts a positive (counter clockwise) torque at that radius. This causes the net torque to no longer be equal to zero, meaning that the angular acceleration is also no longer zero. At this point in time, the angular acceleration is positive, because it accelerates from rest to the initial angular velocity of 10.272 rad/sec. However, once the finger loses contact with the outer edge of the fidget spinner, the torque exerted by the finger is no longer affecting the net torque of the spinner. However, the net torque is still not zero, because as soon as the fidget spinner begins to rotate, the friction between the fidget spinner and its inner bearings creates a negative torque that causes the angular acceleration to be negative. From the time when my finger loses contact to the time it comes to rest, the angular acceleration remains roughly constant at α = -0.296 rad/sec². Due to this negative angular acceleration, the fidget spinner gradually slows down at a constant rate until it comes to rest after t = 34.717 seconds.
However, after the angular velocity reaches 0, it does not immediately stop. In fact, if you look closely in the video, you can see that right before the fidget spinner comes to complete rest, the fidget spinner actually rotates clockwise for a split second. This is part of the very short interval when the fidget spinner has its angular acceleration change from -0.296 rad/sec² to 0 rad/sec². This short interval causes the angular velocity to go below zero for a split second, making it rotate in the opposite direction before the angular acceleration becomes zero. Once the angular acceleration equals zero, the fidget spinner is at complete rest and no longer rotates.