A video is marked as complete when students have watched more than 75% of the duration at least once or has made it to the end of the video.
Currently, we don't have a way to share information on the ways students watch videos, but it's something we're interested in doing in the future. There's lots of great information in that for teachers, including what sections students replay, pause at or skip over. We're excited to share that kind of information when we can.