Darryl Hamilton takes 3 minutes saying this:
If you catch the ball on the ‘throwing arm’ side of your body, your feet, hips, and shoulders are ALREADY lined up to make a strong, accurate throw. Catching the ball on your glove side will cost you precious time to get rid of the ball
What he never mentions: Beltran is moving toward his target when he catches the ball. On the other hand, Crawford is moving sideways, which promotes a weak, off-target throw.
Still a good vid to compare the differences between a fundamentally sound throw and a poor effort