HOW TO FILTER VIDEOS WITH REAL AUDIO

I usually hate when stock footage has audio in it. However, a project I"m working on is requiring it...when I filter results for clips with audio, I have to hover over hundreds of videos that do not have audio. The uploader simply kept a muted audio track on the file. This is a huge oversight by Pond5...a 5 min task is literally taking me hours, because I'm sifting through video after video that is supposed to have audio, but doesn't.

Is there any other way to filter results to find clips with audio. I'm looking for someone who is talking into a camera (like a video chat). The client doesn't have the budget for a voice actor, so can't do that. I literally only need a 5 second clip...

Hah someone please help me!