I wanted to use an extension like this myself, but when I searched it up I couldn't find a proper solution that I liked. There were 2 extensions that tried to do a similar thing but they didn't have note categories, which I felt was an essential part in a tool like this. And one of them only supported Youtube.
What it does
Allows you to take notes while watching a video. You can create categories for your notes to be stored in. Later on, you can view your notes, organized by categories. When you click the play button next to a note, it will open up the video in a new tab and start the video up from the place you took the note at. If the video you took the note in is already open, it will go to the timestamp in your current tab.
How I built it
Challenges I ran into
I wanted it to work with all video platforms, not just a specific one. It was a difficult task to get it to work with sites that used iframes to include their videos such as Brightspace. Should support pretty much any video now(Tested with youtube and brightspace).
Accomplishments that I'm proud of
That it actually works.
What I learned
What's next for Video Note Taker
Improved UI. Release on google extension store.