One must be careful in the physical interpretation of these movies.
Each movie consists of a series of frames. Each frame is just the
probability distribution of the outcome of experiments measuring the
position of the particle a fixed time t after the experiment
is begun. These distributions are the played in sequence as a
function of the time t. Note that the experiments are
carried out by preparing systems in indentical quantum states at time
t=0, and then waiting and doing no measurement until the
position measurement at time t. Thus, we are not looking
at the position of a particle subjected to a sequence of measurements
of its position!
In the different movies, the systems are begun in different quantum
states and then subjected to different external potentials (forces).