Introduction:
Online video tutorials and lectures can be a valuable resource for studying optional subjects for UPSC exams. They provide a convenient and flexible way to access high-quality educational content, allowing students to learn at their own pace and review difficult concepts as needed. To effectively use online video tutorials and lectures for optional subjects, the following strategies can be employed:

1. Choose the Right Platform:
Selecting a reliable and reputable online learning platform is crucial. EduRev is a recommended platform that offers a wide range of video tutorials and lectures for various subjects, including optional subjects for UPSC exams. It provides comprehensive and well-structured content from experienced educators.

2. Plan and Organize:
Create a study schedule and allocate specific time slots for watching video tutorials and lectures. Divide the content into manageable sections and plan to cover them over a set period. This will help maintain consistency and ensure that all topics are covered effectively.

3. Active Learning:
While watching video tutorials, it is important to actively engage with the content. Take notes, pause the video to reflect on key concepts, and attempt practice questions or examples provided. This will enhance understanding and retention of the material.

4. Supplement with Reading:
Video tutorials and lectures should be used as a complementary resource to standard textbooks and study materials. After watching a video, refer to relevant chapters in textbooks to reinforce concepts and gain a deeper understanding.

5. Seek Clarification:
If any doubts or questions arise while watching the video tutorials, make a note of them and seek clarification from teachers, peers, or online forums. It is essential to have a clear understanding of the concepts to perform well in the exams.

6. Practice and Review:
After completing a section or topic, it is crucial to practice what has been learned. Solve previous years' question papers, attempt mock tests, and review the video lectures to reinforce the knowledge gained and identify areas that need further improvement.

Conclusion:
Online video tutorials and lectures can greatly enhance the learning experience for optional subjects in UPSC exams. By selecting the right platform, planning effectively, actively engaging with the content, supplementing with reading, seeking clarification, and practicing and reviewing, students can make the most of these resources and improve their understanding and performance in the exams. Remember to stay consistent and disciplined in your study routine, and always aim for a comprehensive understanding of the subject matter.