"Cruically, our teachers could see how many times we've watched the video..." This sounds like it's normalizing invasive surveillance. Getting kids used to the notion that their teachers should be able to monitor their online educational activities... and then, if governments and corporations are tracking all your internet activity, email communications, phone location data - it's just the way things are done! Now ha…
Our school also has mandatory online trainings every year or two, with videos in a pop-up with most controls disabled. "document.querySelector('video').playbackRate = 1000;" used to save a lot of time, but with cross-site protections it's easier to use a plugin, which is much slower to adjust.