Comment by ashton314

For the Emacs nerds among us, you can hack something similar together: when you start the video, also start a timer running in Emacs org-mode with `org-timer-start` (`C-c C-x 0`) You can then insert timestamped notes with `C-c C-x -`, and once you've got a timestamp note, you can hit `M-RET` to insert a new one with a new timestamp.