Sure, actually when you take a look at "Magical recipe" it is all there :-)

• Prepare a pot large enough to holdall the ingredients (around 30GB)

You need some space for intermediate data, especially when you are making your tries for the first time. Otherwise it is ok to have only some space for resulting 5min HD movie (or less if you produce in lower resolutions.

• Grab GitHub memories of what developers did for the steemit.com site
• Do the same with memories related to Steem itself

git clone
of course

• Put those memories together

cat and sed
depends if you would like to have two repositories as one tree, ignore if you are just using this for one repository

• Stir them gently until you get chronological consistency

sort -n if you are joining logs from more than one (to keep it in chronological order)

• Condense the memories so that one day would become one second

That's a parameter -s 1literally telling that one day of log should be visualized within one second of movie

• Create a pleasing vision for the beholders.

Data are processed by an open source software called gource (as @inertia already mentioned) it can output to pixmap, which can be later converted using avconv aka ffmpeg to H.264 in mp4 container, in this case 1920x1080/60fps.

• Add some happiness to please their ears

and added some audio (also using avconv)