The riders in both videos do the same patterns.
2. What is one thing that the first rider does, but the second rider does not?
They both have different times.
3. What is one thing that the second rider does, but the first rider does not?
One of them goes slow and the other one goes fast.
4. Do you see anything either rider could do to improve their overall horsemanship, or barrel time?
The second racer on one of the videos was going slow.