Hi!
Yes, you can use these songs on YouTube videos as well. They are not royalty free but they are not registered for content ID, so for YT to identify and eventually block them. You get the license of course when you buy the music pack, so you are fully entitled to use them in your games or videos.
In any case, if you are going to use these songs and you ever get any copyright issues on YT just let me know (but that never happened before, as far as I know)