It's a bit curious Google isn't already doing this, given they have both unfettered access to a metric shit-ton of video material (through youtube), a lot of computational power, as well as a lot of expertise with regards to search.
Plus large scale retrieval of video information is pretty challenging (even for them). Facebook had to create a new framework (FAISS) to solve this problem. So I presume it must be pretty challenging.
But on a short scale, they already do this. For some queries, in the search results, they show a youtube link which automatically goes to the relevant part of the video.