Google announced it's now adding the ability to find specific, or "Key Moments" from videos in Search, and this is especially useful for long videos.
Creators provide timestamps in the videos which means a searcher can run a quick scan of the video content, without going through the whole video.
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If you're a content creator and you want to participate, there's a link to the extended tools to enable "Key Moments" in videos. https://docs.google.com/forms/d/1PI6mUjBXAOipL_nkJGybT4v2OHj4LDozkZIMG4HhvCs/viewform