I was searching for video interviews with an author, putting her name in quotes. Most of the videos in the results do not have that author, as if the quotes aren't working.
https://kagi.com/videos?q=%22maria+reva%22+interview
When I later did the search without quotes:
https://kagi.com/videos?q=maria+reva+interview
There were only six results, and only one with the correct name. Six results... Google returns dozens of results, all with that author's name, either in the title or in the text description of videos.
