If you are looking for a video that can help with business correspondence and reporting while teaching in English, there are numerous resources available online. Here are a few options:

1. Online courses: Platforms like Udemy, Coursera, and LinkedIn Learning offer various courses on business correspondence and reporting in English. These courses often include video lectures, practical exercises, and real-life examples.

2. YouTube tutorials: YouTube hosts a vast collection of instructional videos on business writing and reporting. You can find channels dedicated to teaching English for business purposes, providing step-by-step guidance and tips.

3. Webinars: Many organizations and educational institutions conduct webinars on business communication skills, including correspondence and reporting. These webinars often feature experts who share their knowledge and best practices.

Regarding mock tests, if you are looking for practice tests to assess your skills in business correspondence and reporting, there are resources available for that as well. Some options include:

1. Online practice tests: Websites like ProProfs, TestDome, and Indeed offer free or paid practice tests specifically designed for business writing and reporting. These tests can help you evaluate your skills and identify areas of improvement.

2. Practice books: Many publishers offer books with mock tests and exercises for business communication skills. These books often come with answer keys and explanations to help you understand the correct approach.

Remember, consistent practice, real-life application, and seeking feedback are essential for improving your business correspondence and reporting skills in English.