What's the purpose of hard coded English subtitles?

Given that the videos will be utilized in English classes, it is crucial to ensure their accuracy. Furthermore, it's worth noting that the videos are subtitled rather than closed captioned. Subtitles are prefered for classroom use because they only display dialogue and other relevant sounds, whereas closed captions include descriptions of non-speech sounds, which may be distracting and unnecessary in a classroom setting.

What's the purpose of hard coded Japanese subtitles?

These subtitles are human translation, localized, subtitled. In addition, consideration has been given to the kanji students may or may not know. And, the videos are subtitles, not closed captioned. Finally, even with dubbed videos, accurate subtitles are a valuable teaching resource.