I think youtube-dl/archiver tools present some ethical problems.

If you're publishing something for commercial, do you have a right to one day revoke that item you've published? I think many would say that no, you don't have that right. Fair use and all that.

But if you're publishing your diary or some other personal items about your life, not for something commercial, then I think many would argue that yes, you should have that right. To have the right to make all data about you disappear.

I'm pretty sure RMS explored these ethics before in some of his writings.

Personally, I'm a user of youtube-dl and have written some tools based on cloud tech that helps me automate archival of all media I come across that I find valuable. But I'm not so sure it's completely ethical in all cases.