That's still not a reprint. You're repurposing the original audio for something else. People do this all the time to make their own animatics and PVs.
Unless the producer explicitly states that they're banning such uses, it's fair game. People should absolutely source things that aren't theirs though.
A reprint, as I said before, is taking the original upload/PV and reuploading it somewhere else. Like taking a niconico video and then posting it on YouTube. Nothing about it is changed. Not the audio. Not the visuals. Just the same exact copy. And a lot of people do this without permission from the producer and sometimes without credit, which is not okay to do.