deleted by creator

You need to update yt-dlp, ie:

pip3 install -U yt-dlp

But first you probably need to install an updated python version; the latest yt-dlp needs at least python 3.10 iirc

Practically speaking all open source software is communist, insofar as the capital, which in the case of software would be the source code and the means to build and deploy it, is available to anyone with the wherewithal to use it.

I have a cheap brother USB printer, the HL-L2300D. I got it for $80 refurbished. I get wifi printing with my phone through cups on my attached computer. You do need to install the ppd files from brother for optimal performance iirc.

Then it is working. That is what that code was checking for.

Specifically, -n checks if the variable exists and also does not have a null value.

If you want to reverse it, ie, check that those conditions are not true, put an exclamation mark in front of the whole thing.

You need to reference the value of the variable, ie:

if [[ -n "$VARIABLE1" && -n "$VARIABLE2" ]]; then
    echo "OK"
fi

At least they are admitting it was wrong instead of doubling down