So don't clone it, read it online. I reserve all rights, but I do give license to my host to make a "copy" to let you view it. I do that specifically to prevent non-biological entities like corporations or AI from using my code. If you're a biological entity, I specify you can email me to get a license for my code for a specific, defined purpose. I have a conversation with that person, then I send them a record number and the terms of my license for them in which I grant some rights which I had reserved.

Also, in your example, the copyright for the book or dvd is for the content, not the physical item. You can do anything you want with that item but not the content. My code is similar, I'm licensing my provider to serve you a visual representation of the files so you can experience the content, not giving you a license to run that code or use it otherwise.

> possibly even as soon as a webserver sends your files to my browser.

Considering how it works for personal data with the RGPD, I doubt that this is even needed ?

Also copyright is something you have by default, no licence terms necessary.

OTOH if they aren't a human, then copyright barely applies to them anyway (consider search engine crawlers indexing your website for instance), and I don't think that putting up a notice will legally change anything ?

(You'll probably have better luck with robots.txt ...)