• Little League Rulebook App
  
•  2023 Rules Instruction Manual - "The .pdf rulebook" : An annotated version of the Little League Rulebook, used in the Little League Umpire Academies.
•  2024 Little League Rules Changes and Clarifications
•  Online Umpire Quiz - See how well you know the rules of the game with this interactive quiz that contains over 300 questions.

Virtual Rules Trainings and Video Situations

• Rules Presentations - Video rules sessions going through the LL rulebook. The presentation documents are here.
•  Central Region rules presentations
  

• Little League University - Rules videos provided by the official Little League site.
• Baseball situations are analyzed by CloseCallSports and MJH Baseball.

From Stu Hartenstein's Umpire Training Page - Informational rules videos using game footage:

• Interference and Obstruction
•  Type B Obstruction
  
• Obstruction: Type A vs Type B
• Rundowns and Obstruction
• Obstruction and Plays at the Plate
• Runner's Lane Interference
• Runner's Lane Violations
• Interference Buffet
• Runner's Interference
• Interference on the Batter
• Umpire Interference

Additional Resources

• The Little League Umpire Registry (registration is free!) gives you access to the latest information on rule updates/interpretations, umpire mechanics training videos & manuals, information and registration for available training programs, and volunteering for Regional and/or World Series tournaments. 
• The West Region Little League Umpire Alumni Association website has training, rules presentations, and other resources.