Is that necessary though? Importing a rectangle as a picture and using the Size and Position filter does not seem to be the most tedious task.
There are already so many suggestions that this seems like a luxury. Perhaps it is easy to implement but then many would ask why there are only x shapes present and that this particular one is used so often, it has to be implemented as well. I have the feeling the developers have enough on their roadmap.
I am not opposing this idea I am just questioning the necessity.
Here is the result with the above HTML code applied to a transparent clip on V2. I re-sized and positioned the red box with the size/position filter. I’ve added a fade-in and fade-out. Watch how the red box appears over bar 2 of the music.
It’s also possible and very easy to use a color clip with 2 or more mask simple shape filters to create boxes, rectangles, circles and other shapes. Rotate and scale, and size and position filters can be used to position, size and rotate the shapes.
Use text filter. Select wingdings or dingbats font find a square. I personally use the pointy fingers G or H . You may be able to stretch the square using size and position with distort enabled. The order of your filter layers will be important, dragging them around with trial and error. It might require a separate video track of green screen ,and a simple chroma key.
Wingding finger is much less fussing about.