You misinterpret - I am not saying that what you experienced was technically impossible (you saw a URL, later recreating a valid URL at least partially), but that your interpretation of what happened is neither practical nor possible in the general case, nor is it necessary. Let's try with an example:
You see a poster. "Samsung Galaxy, for real this time. Tune in on 1st of April to watch the ceremony live where we subjugate the last planet in the Milkyway.".
Scenario 1: The poster has a QR code, and a URL: https://events.samsung.com/press-room/world-domination. You memorize the hostname (events, samsung, com), and half a day later you manage to pull up a page for events, select the intended one, and get to the live feed.
Scenario 2: The poster has a QR code, no URL. You memorize "samsung galaxy", or "samsung event", or even just "samsung", and half a day layter you type this into your browser's address bar, which gives you as the first result the live feed you were looking for, or at the very least to samsung's event page.
"memorizable URLs" is not human-readable information, but computer-readable information constructed with certain rules to mimic human-readable information - e.g., the company name mangled to fit URL syntax. The original, unmangled information is easier to remember.
Scenario 3 the poster is a cool looking image with people doing something that interests me. There is a QR code and no other information.
Scenario 3 the poster says something is happening like "Neighbourhood dinner, Sunday at 7 -- Want to help cooking? Scan this code" -- There is a QR code but no information about who is organising it, where it is or how else to contact someone about helping to cook.
Yes, a name serve just as well as a URL, the point is that people begin to believe that a QR code is more convenient than text. Give me a link, give me a name, give me a search term, just give me something more than a QR code.
If you need to add human readable information (which is your scenario), a URL is never the right answer. Write a name or a sentence. Computer-readable information is for computers to read.
You see a poster. "Samsung Galaxy, for real this time. Tune in on 1st of April to watch the ceremony live where we subjugate the last planet in the Milkyway.".
Scenario 1: The poster has a QR code, and a URL: https://events.samsung.com/press-room/world-domination. You memorize the hostname (events, samsung, com), and half a day later you manage to pull up a page for events, select the intended one, and get to the live feed.
Scenario 2: The poster has a QR code, no URL. You memorize "samsung galaxy", or "samsung event", or even just "samsung", and half a day layter you type this into your browser's address bar, which gives you as the first result the live feed you were looking for, or at the very least to samsung's event page.
"memorizable URLs" is not human-readable information, but computer-readable information constructed with certain rules to mimic human-readable information - e.g., the company name mangled to fit URL syntax. The original, unmangled information is easier to remember.