I've got subleq+eforth (https://github.com/howerj/muxleq) running in JS
which is dead simple to do. No input but I could output
ASCII mapping values to an array.
possibly because yt-dlp updates rapidly and would simply switch to the correct fingerprint, but Google-approved clients use many different and uncontrollable fingerprints (as they use OS TLS facilities for example).
https://jxself.org/compiling-the-trap.shtml
I've got subleq+eforth (https://github.com/howerj/muxleq) running in JS which is dead simple to do. No input but I could output ASCII mapping values to an array.
https://esolangs.org/wiki/Subleq
So, yes. yt-dlp runs propietary Youtube JS code defying the original purpose.