Yes, avoid using royalty (copyrighted) music. Use non royalty music that you can find anywhere online, or use your own music. Though usually they require you to put credits to the song and artist anywhere in your video/description.
No, there is not. Unless you upload your video to some hosting site, where people can download it. You can't possibly upload it on YouTube and not get a copyright strike.
A quick google search did it.
In the description, just put: " I do not own ANY of the soundtrack, property and rights for audio go to (band/singer name)"