Yes, pitchers sometimes intentionally throw those kind of balls, in order to do what happened in the video. The one in the video is an extreme example, with most balls of this type crossing the plate very low, but not hitting the ground. It's also sometimes done with no intention of it being playable, but rather to throw off a batter for the next pitch or two.

There are also situations where a pitcher will intentionally walk a batter, such as if the batter is very good, so that they can pitch to the next player, who may not be as good of a hitter. There are a whole other set of rules though on how to intentionally walk someone. An at-bat can get complicated with the various ways a batter and pitcher can go about trying to get into the headspace of the other in order to achieve their successive goals.