I'm doing some video editing and would like to be able to draw directly onto the video in order to highlight objects, produce arrows, etc. It should be possible to do this with Grease Pencil, but I can't figure out how. How do I do this?
Looking for other people who've done this, it seems that it can be done, but I can't find any instructions. The obvious thing (drawing on the video with D held down) just creates an annotation rather than adding a Grease Pencil layer, and annotations seem to be ephemeral and are intended for notes to the editor rather than actual video edits --- I'd also expect them to belong to a strip, which they don't. I have found a few references to people who've created a 3D scene with the video projected onto a square and then used the 3D Grease Pencil to draw on that, but that seems... wrong. Also, this appears to be for Blender 2.7.
But I keep finding refrences to people who've actually done this, so it does seem to be possible. Can anyone tell me how?
For reference: this is with Blender 2.82. I know that Grease Pencil has had a major overhaul since 2.80.