As I introduced in this article, you can record Microsoft's Windows Media files from the Internet using ASFrecorder, or Hi-Net Recorder. However, you shouldn't over-use them. I strongly suggest that you use these tools for personal and educational purposes ONLY.
Next time, I will show you how to extract audio files out of the recorded .asf video files, which I demonstrated for you in this article.
Until the next time, please enjoy your teaching and learning Japanese.
Once again, I deeply apologize to Mac users, not because I do not like Mac, but because I do not have a Mac to do research. If someone or some institution donates a decent Mac computer system, I will develop equivalent Mac versions of these writings.