The search for is the start of a rewarding challenge. Russian is a "Level 4" language according to the FSI, meaning it takes time and dedication. However, by mastering the basics found in that first lesson—the alphabet and core phonetics—you lay a rock-solid foundation for fluency. Удачи! (Good luck!)
Some Russian universities and educational institutions offer online courses or have resources available online for international students. For example, Moscow State University, HSE University, and others might have English-taught programs or resources.
In the modern era of streaming, where formats like MP4, WebM, and MKV dominate due to superior compression algorithms, searching for an .avi file is a distinct throwback.
If you clarify whether this is for a specific textbook, online school, or a known video series, I can point you to legal learning alternatives.
It is not an educational series or a language school.