Here are a few resources for players or parents looking to improve understanding of the game, fundamentals, & strategy:
Ripken Baseball - Offensive, Defensive & Pitching drills, tips, & fundamentals: http://www.youtube.com/user/ripkenbaseball
IMG Academy Baseball - Offensive, Defensive, Pitching & Positional drills, tips, & fundamentals: http://www.youtube.com/user/imgbaseballacademies/videos
ProSwingNY - Tips & Video Instruction & Some Situational Strategy: http://www.youtube.com/user/ProSwingNY
Defensive Position "Cheat Sheet" - General Defensive Guidelines for Each Postion:
http://www.my-youth-baseball.com/support-files/9-legged-monster-defense.pdf
Slow-Motion Video Analysis: http://appcrawlr.com/ios-apps/best-apps-baseball-swing (ex. Ubersense, SwingReader Baseball, Coach’s Eye, Coach My Video)