I like in the little example animation, hello.txt is uploaded and a url is returned, but then a completely different url is used to get the hello.txt back.
You might also want to add a delay at the end of the animation before looping. As it is you only see the end result for a single frame.
Slow it a bit down too while you are at it.
make it not loop!
Or at least add a delay at the end. It's not super hard to figure out what must be going on, but really the only thing you have time to see is the first line.
How did you make the demo? I'd love to put something similar on http://ipinfo.io
Using tty2gif, I've made it work at my mac. Only need to find some time to upload the changes to the repo.
http://z24.github.io/tty2gif/
tty2gif author here. Could you send me a pull request about your mac version? I can merge them if I have time. Thanks for your efforts!