I want to know how to determine if I should block or receive a pitch as a catcher. Are there any good videos or tips to help me?
Block when it bounces, catch it if it doesn't
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Catching is the same like hitting, in your mind you have to continue the path of the ball flight before it gets there so you can get your glove/bat to the spot where the ball will be a split second later. As a catcher that is actually easier than as a hitter because you know the pitch type unless there is a sign cross up.
This takes experience of course and for example with a breaking ball you more often need to block the ball than with fastballs.