I don't understand why this is happening.

We changed the background music of the video, and the result is shown below.

The one on the right can be published, but not the one on the left.

I can understand if it's audio, like saying obscene words. It's only sound, right?　What is soundness?

Below is the left video in question.

PS: Dear management, if you have a problem with this post, you may delete this post.