Blender 2.8 Video editing - annotation Do you know if you can annotate a video in Blender?

I have tried to d + mouse draw, but I need to control when the grease pen stroke is shown.

I am trying to add circles to a video sequence, to bring attention to an area.

Thanks in advance
The annotation tool is an internal tool for the user, it is not for adding visual drawing to the rendered output.

In the VSE, you can add a scene strip, which means you can create a circle using geometry or a grease pencil object in the 3D view and add it to the VSE.

You can also add a single image to the VSE. So you can save a circle as a PNG with a transparent background and add that to the VSE.