There is some detailed information on next post on the Codex. It doesn’t seem to be possible to do what you want to do as the feature works in chronological order not based on search term.

One work around may be to create video playlists for key search terms (I would love to add an example but I don’t know much about fishing!!). I realise this is very manual but it could get a similar result to what your boss would like.

Good luck!