No need to download the zip file.
The command downloads it.
You are aware that the same device where you run the command needs to already be running dump1090-fa?
If you aren’t using Raspbian / piaware sd-card image / Debian / Ubuntu, the install script will probably not work.
But i assume you are using one of those?
No guarantee either, but i’m not aware of any problems.
There is also a thread for it: Timelapse1090
(If you have any comments on it, doesn’t explain any more than the github page)