There are several video lectures and online courses available for Political Science and International Relations (PSIR) preparation. These resources can be helpful for UPSC aspirants who are looking to gain a deeper understanding of the subject and enhance their preparation. Here are some notable options:

1. Unacademy: Unacademy offers a wide range of video lectures and online courses for PSIR preparation. They have a dedicated category for UPSC CSE preparation, where you can find lectures by experienced educators. These lectures cover various topics in PSIR and provide comprehensive guidance.

2. YouTube Channels: Many YouTube channels provide free video lectures on PSIR. Some popular channels include Study IQ, Mrunal, and Pratik Nayak. These channels offer a vast collection of lectures on different topics, including political theory, international relations, Indian government, and more.

3. EduRev: EduRev is an online learning platform that offers a variety of resources for UPSC preparation, including video lectures for PSIR. They have a comprehensive collection of lectures by experts in the field, covering both theoretical concepts and current affairs.

4. Online Courses: Several websites offer structured online courses specifically designed for PSIR preparation. These courses provide in-depth coverage of the subject, along with study materials, quizzes, and mock tests. Some renowned websites include InsightsIAS, BYJU'S, and ClearIAS.

5. Government Websites: The official websites of government institutions like the Ministry of External Affairs and the Ministry of Home Affairs provide access to important reports, policy documents, and speeches related to PSIR. These resources can be valuable for gaining insights into India's foreign policy and domestic affairs.

Remember, while these resources can be helpful for PSIR preparation, it is crucial to supplement them with standard textbooks and regular self-study. Additionally, joining online forums and discussion groups can provide an opportunity to interact with fellow aspirants and experts in the field, which can further enhance your understanding of PSIR.