“I saw a video with sound and the sound seemed like what cluster munitions sound like.”
Link ?
Here’s a newer version of that video. The older version is mentioned here too.
https://youtu.be/3X3zHxritLs
Just in case I didn’t give a proper URL the video is on YouTube from “Military & History”
and is titled “Crimea: Civilian Casualties Caused by Ukrainian ATACMS, new Video shows.”