I think the video works well in giving a better impression of how the plastic cases have turned out. It is very easy to get a false impression from a single photograph. A video showing several different lighting conditions works well.
As for painting: it adds complexity, and therefore more expense, time, and adds more things to go wrong. If it peels (I know it shouldn't) it gives a poor impression. Like others, I value function over aesthetics, which I know is a minority opinion in the general population. Frankly, covering up the flow marks resembles hiding a problem, which makes me suspicious. If the flow marks do not affect the structural integrity of the components, then for me, it is fine to show them. I know mine is one among many opinions, and I make no claim to be right.
I also wish to add my thanks to azouls for keeping the community informed and showing such personal commitment to the project. I appreciate it very much.
Getting the production version out to as many software developers as possible is a priority now. I suspect most, if not all of them, are not concerned about the looks of the cases, and just want to get their hands on working production kit so the challenges remaining can quickly be overcome.
Thanks to EvilDragon for his commitment too. If you haven't done it yourself, it is difficult to appreciate how hard it is to keep motivated on a long project like this. I wish him every success and a less stressful future.