https://www.youtube.com/watch?v=2Wp6q5hUdtA

Nice example of someone building their own paper-based zettelkasten an how they use it.

Seemingly missing here is any sort of indexing system which means one is more reliant on the threads from one card to the next. Also missing are any other examples of links to other cards beyond the one this particular card is placed behind.

Scott Scheper is using the word antinet, presumably to focus on non-digital versions of zettelkasten. Sounds more like a marketing word that essentially means paper zettelkasten or card index.