Are The New Monstercat Song's In Rocket League Copyright Free?

[incredibly talented individual]

On every other Monstercat video, it has a link to buy the liscense to the song, but on the Rocket League one's it doesn't, and I wanted to know if anybody knew if it would be okay to use the Rocket League songs from Monstercat in a video?

I don't want to get in trouble if one of the Monstercat song's plays in my video while I'm on the main menu or something. If anybody knows the answer, it would be very helpful if you could let me know.