Also it's a site called https://lickd.co/ where you can use mainstream music now without issues.
Noooo. Really? Don't you think I would know about a site before I post it? It's better than paying $800 if you want to use a song. They email you confirmation. It's not Youtube doing it as much as I want to blame them it's not it's the record labels. I'm saying it's an option.You should note however that's not free AND the licence is valid for one video only you need to buy a new song licence for every video you want to put it a song in.
Also how does YT know that you have licensed the song? Sure lickd can provide evidence you've done so but how does it stop YT from issuing a copyright strike?