I wonder when google search results will start directing you to the middle of a YT video

They do this already. Some google search results will present a snippet of a Youtube video most relevant. Here's an example of a search query with such a snippet.

https://imgur.com/a/bxiBYUO

Here's an example: https://www.google.com/search?hl=en&q=youtube%20replace%20fu...

I saw them do it a few years ago, it would link to the relevant clip in the youtube video that you could watch directly in the search results