not gonna lie, Santander and Soto are about the same speed, which is to say, not very fast, but Santander looks decent in the outfield, and Soto looks like a complete butcher.
Before the ball got to him, he set up with 1 knee on the plate and his body covering about 4/5 of the plate. I saw some examples where 1 foot on the plate like that where it was supposed to be considered a plate blocking violation. But it was close, because you could argue that the tiny corner constituted a (tiny) path to the plate.