I need a Youtube Content ID

I am a Songwriter and wrote songs for several musicbands. Now i like to monetize the youtubevideos of my songs and give the bands that performed these songs a cms partnership so that they can easyer promote these videos. i have an youtubeaccount or also can create a new one if its needet but i dont know how to get the content id. it dosent mater how you do it, if i get a youtube content id you get the money