Strictly speaking, unlicensed music, regardless of whether it is used commercially, may be processed due to copyright, and you may even be held legally responsible if it is used commercially.
When you submit articles at Station B, if you turn on creative incentives to make money, it is commercial. However, because copyright supervision on the Internet in China is not yet complete, even if you use unauthorized music to submit, you can pass the review. (It is recommended to ask customer service first) Videos that infringe copyright will be removed only if the copyright owner actively requests it. However, copyright owners generally do not strictly require small online authors to remove videos. After all, supporting fan creations is also a part of expanding their influence. Of course, the difficulty in safeguarding rights is also one of the reasons.
If you have more fans and greater influence, you should consciously pay attention to this aspect and use copyright-free music.
If you need some copyrighted music, you can search for music licensing websites online, and they will provide specific purchase channels.
This is a related question on Zhihu: web link