My elementary school once brought exchange students from Australia. They did short presentations about their culture, and spent the rest of the month in the library with a teacher that came with them. They never really talked with us or anything.
Given that neither twitch nor YouTube will let you, you should look at Owncast; but I don’t know about a particular server for that
Accidents happen, and people panic. Maybe she thought she was pressing the breaks and made the problem worse. I highly doubt anyone would do it intentionally.
And you will need it in 5-10 years if/when you have a display and accessory that requires it. I doubt anyone will need the new cable anytime soon