Do not just watch the lesson like a movie. Use the portability to your advantage:
In an era of MP4 and streaming, why would anyone seek an .avi file? The answer lies in portability. russian institute lesson 1avi portable
You can start watching russian_institute_lesson_1.avi on your work PC during lunch, copy the same file to your Android tablet via USB OTG cable, watch it on the bus, then finish it on a friend's laptop. No cloud sync required; just drag and drop. Do not just watch the lesson like a movie
Do not stop at the video. Make your USB drive a complete learning toolkit: You can start watching russian_institute_lesson_1
Unlike course software that requires registry edits or license keys, a .avi file is just a video. Double-click. Play. It is "portable software" in the sense that it requires no host program other than a basic media player (VLC, MPC-HC).