We can also do a multi-audio video file with images passing by to explain the basics of the free/libre software movement, since it would use simple images only, it allows us to use a low frame rate and **possibly** save disk space.
I have been doing short explanations about the free/libre software movement in Brazilian Portuguese, in every first video in which I talk about a new free/libre software in my video series, see <https://goblinrefuge.com/mediagoblin/u/adfeno/m/explorando-jogos-livres-fish-fillets-next-generation-como-tudo-comecou-mensagem-na-maleta/> for an example. I know avconv (from the "libav-tools" package) can make multi-audio video files, but I didn't test decreasing frame rates for the video track/stream.
