Vim is a great, great programming tool. Even after years of experience with it you still get to discover, either by change or by sharing, fantastic tips to make an impossible task incredibly easy.
It is the case with my recent problem of exporting the visual aspect of vim (as from terminal) to an HTML document, including the highlight colors. How to do it? Well, I tried pygments and it's really great, but I asked on SuperUser for alternative methods. It appears that Vim supports this natively. Just issue
to Vim, and it will create and open an HTML file containing what you see in your terminal. A big thank you to user progo for this tip.