Use of music for commercial or non-personal purposes in particular is prohibited unless you have obtained appropriate licenses.
Unauthorized content may be removed
If you post content that contains music owned by someone else, your content may be blocked, or may be reviewed by the applicable rights owner and removed if your use of that music is not properly authorized.
Most people don't understand the issue. What actions people generally find acceptable are very different from the actions permitted under copyright law, but most people don't understand that.
> You may not be able to post or access videos containing music in every country of the world
>
> We want you to be able to share videos with your family and friends wherever they are, but any music in your video, if it is allowed at all, may not be available in all countries of the world.
That part about "music in your video, if it is allowed at all" really feels like it's setting up a scenario where you just aren't allowed to have music in your FB videos at all.
