Link to site: https://vialogues.com/
Classroom discussions are a useful way of getting the students involved with their learning, helping them to form and justify opinions and arguments. With this site you can add a video from Youtube or Vimeo, by pasting in the URL.
Then you can add a text based summary or discussion theme and share it with your students, they can respond by adding their own text response. You can then see when the students' responses were logged by looking at the peaks that appear in the visual timeline. Here is my walk though guide to using Vialogues