The channel is all about
Libraries or collections of musics and audio which are recorded, edited and put together for one of two purposes;
Internal use for a production facility/studio and its team for use in current and future projects
For commercial resale, so that other sound designers, editors, or any other kinds of content creators may have access to the sounds.
In the case that they’re for commercial use, the sound effects are considered Royalty-Free, and may typically be used any number of times after the initial purchase without needing to pay a recurring royalty at any point afterwards, so long as they are not individually resold as is (that is, they must be used in a larger project, or modified in some reasonably significant way).
In such a sense you can use the music and sound effect that I upload in this YouTube channel for free
see you in the comments