Major slump to begin the season. She's never been in one like this before, generally is a very good hitter with lots of pop. Up here north of the border our girls (12u) play with 11inch balls and 35 feet distance from the pitching rubber to home plate. She is currently playing 14u, the pitching is now 38 feet from home plate and our picthers are using 12 inch balls. My daughter is way out front on most pitches, and either under or over the ball when her timing is right. And then the pitcher throws her change up and it's lights out. So for the most part, I think her issue is the distance has changed and pitchers are adjusting which means slower pitching.
I feel like she swings for the fences on every pitch, which I know can be a major part of the problem as well. It's not necessary because she has tons of bat speed when swinging at 80% capacity. But I'm not sure it would be a good move to tell her to settle down and not swing so hard... she's not off balance when swinging hard and she keeps her head on the ball. I think because she has been striking out so much it might be a mental thing now. Soft toss, hitting off the tee etc she is hitting the ball just fine.
Sorry, I don't have a video to post. Any general advice would help, she's quite frustrated right now. I keep assuring her that she will turn it around once she adjusts.