This walk through comes from @GalacticFurball who tweeted two images representing the youtube_dl source code as of 2020-09-20. They mentioned later in the thread that they struggled converting the gzip-compressed tarball of the source code with Imagemagick to a PNG, so they ended up using a 3rd party website to do the work. This Gist will show you how to do it cleanly and exactly.
If you would like to convert any non-image binary into PNG, Imagemagick makes this trivial. I will be executing the commands on a Debian Linux system, so you may need to adjust the commands for BSD, macOS, or Windows as necessary.