MoocNote is a free tool for taking notes while watching a YouTube or Vimeo video. All of your notes are timestamped and all of your notes can be shared with other MoocNote users. In the short video embedded below I demonstrate how to take notes while watching videos through MoocNote.
Applications for Education
MoocNote can be a good tool to use to create informal flipped video lessons. You can create a group that your students join then share a video with them that they take notes on while watching it. You might consider making multiple groups within a class then have each group watch a similar, but different video on a topic. Then have your students compare notes on that topic.