I think maybe the video player in UV might be too large -- you can only see a few lines of annotations. I do think it needs to be "stuck" to the screen but can we make it smaller?
https://tanyaclement.github.io/film_example/film
We've reduced the size of the video panel to 350 pixels. @lgsump we tested with your project, so you might try switching the layout back to UV and seeing how it looks.
I think maybe the video player in UV might be too large -- you can only see a few lines of annotations. I do think it needs to be "stuck" to the screen but can we make it smaller? https://tanyaclement.github.io/film_example/film