AudioHero advertises plain-language and similarity search together with filters such as mood, genre, duration and tempo. Those are useful discovery mechanisms, but their practical value needs to be established against a real request. Start with a short brief: what the viewer should feel, where speech must remain clear, how long the cue needs to last, and what should happen at the ending. These are more actionable criteria than searching for something vaguely cinematic.
For a software demonstration, a hypothetical brief might request a restrained, steady instrumental bed with no attention-grabbing lead line, a calm introduction and an ending that can resolve around the final instruction. For an energetic product announcement, the desired shape might be different. The point is not that one genre is inherently correct. It is that a stated purpose makes it possible to reject attractive but unsuitable tracks without spending another hour negotiating with yourself.
Build a shortlist of three candidates and compare them under the same rough cut. Do not audition one at a flattering volume and another barely audible. Note the exact reason each fails: distracting melody, an early climax, a change of mood, insufficient space for speech or an awkward finish. That record teaches you which search terms work for your projects. It also gives a collaborator something more useful than an unexplained preference for the second option.
Use similarity search with material you are allowed to upload, and avoid sending unreleased client audio without permission. A reference can communicate rhythm or texture, but resemblance is not a license to imitate another recording closely. If a result feels too close to a recognizable work for the intended use, choose a different direction or seek appropriate advice. Discovery assistance should expand the search, not turn creative judgment into a similarity contest.