[tones411]

I wondered the same about text in search results. My guess is that web page authors would rather let it happen than lose out on the traffic.

[koolba]

This is exactly the type of thing that “fair use” is supposed to cover. It gets blurrier though when you get into fuller media like images and video. Does a thumbnail count? How about a 10-second clip? How about a speech-to-text transcript?