Finding search terms is the one task I consistently use LLMs for. They did not say that though, they said replacing traditional search with LLMs, that traditional search is about to "go the way of the dinosaur". I dont trust any local LLM to accurately recall anything it read.

Not to mention that once we gain dependence on LLMs, which is something big tech is trying really hard to achieve right now, it will not be all that difficult for the creators to introduce biases that give us many of the same problems as search engines. Product placement, political censorship, etc. There would not be billions of dollars in investment if they thought they weren't going to get anything out of it.

Not to mention that the scraped indexes can and should be shared. Unfortunately what OP is seeing may be a move to thwart this type of brute force scraping, and might resolve as dynamically assigned domain addresses, where the URL of a set object is temporarily assigned and streamed only to a single or group of IP addresses that request it within a given timeframe before being rotated out until found in search again and then reassigned a new URL, etc. This is a frankly stupid use of resources, but can effectively be used to prevent crowdsourced indexes from proliferating, and to punish IPs or even MAC addresses or browser fingerprints associated with downloading and reuploading videos which almost certainly have stegnographic fingerprinting embedded that associate with who the video was served up to at the time it was downloaded.