Is there a tutorial on loading videos and adding annotations?

[hiroalchem]

I was annotating extracted frames, but it's difficult to annotate without checking consecutive frames, so I'm trying to annotate directly from the video.
However, even though I looked at https://deeplabcut.github.io/DeepLabCut/docs/gui/napari_GUI.html, I don't quite understand the procedure. I can load the config.yaml and the video mov file, and I can add annotations, but when I try to save, I get a KeyError: 'root'.
Also, when I press the extract frame button, there's no indication that the extracted images were saved. Is there a detailed explanation of the procedure somewhere?