1) Saying a base coach may have a scoring device on the field is DEFINITELY NOT SAYING not elsewhere like in the dugout. Anyone with that logic would be suspect of confusing any rule.
2) I don't think we have jurisdiction over the outside of the backstop.
3) If the cell phone was being used to give anyone directions or other in-game communication; probably not legal.
4) "youtube videos about bad calls, etc. " are a concern.
Without videos or calls, what would we talk about during the College Softball Championship.