This scares me a bit too, I watch basically all Youtube content via Youtube-dl. I have a script that runs every night on Mac, so that new content automagically appears in my Movies folder.
Fair warning, it’s quite macOS specific.
Same thing happens with the newpipe android app which somehow manages to be far superior to Google's official YouTube app.
You could argue this is bad because it bypasses the distro release system, but then, Youtube also updates itself without the distro's approval, so the software that interfaces with it must as well.
What needs to stay under the radar are the dozens of downloader sites and GUI apps that offer the same functionality and ten times the convenience.
Yes that's right, clicking 15 times for every single file is easier than having a script automatically download a series. ;)
youtube-dl being more known isn't that hazardous, as long as there's a community of people ready to confront the latest ballast sent to make people's lives more miserable - which there is so far, and I'm honestly incredibly grateful for that.
Unless it’s burnt into the video stream.