Are the movements mentioned during prayer—such as moving one's feet and adjusting one's trousers—considered among the many successive movements, and what is the criterion for determining that?

We hope that the movement mentioned does not constitute excessive action that affects the validity of the prayer. Even if it were so, it was done out of necessity, and excessive action done out of necessity does not invalidate the prayer. Your prayer on a pure prayer rug placed on an impure rug is valid. Some scholars disliked this, while others validated it due to the absence of direct contact with the impurity. We advise you to stop indulging in obsessive doubts if you are afflicted with them.