It's in the Vimeo 640x480 (2 pass) format in Kdenlive's Render list. Nothing special, just some NASA images sequenced with PhotoFilmStrip then edited in Kdenlive (added the Baltan effect, some visual fades, and the audio track). Btw, the shakiness of the initial images came with the MPEG created by PFS.
Titling is unstable in my version of Kdenlive (0.7.7 rev.4166, with MLT 0.4.7), lots of annoying crashes. It's been a while since I updated, I'll test the latest asap.
Is there a preferred format for videos presented here ?