Post like this are why I love reading the basketball side of this forum. If only we had these sort of example clips in the softball world.
As a non BB official (other than emergency person-with-a-pulse coverage on sub-HS games):
#1 - I don't know the rule enough to say. I want to say no backcourt violation.
#2 - In real-time, I like the block call as the defender was moving forward an instant before contact. That said, in slow-mo, I think he gets LGP before the contact, but I could be wrong. Charge/PC.
#3 - Again, I don't know the rule well enough to know, but the release of the ball looks like the start of a dribble. I don't see a travel before the release. I can't see the feet well enough to judge. EDIT: on a few more watchings, I see the pivot foot step now...in slow-mo I think this is a good call.