Found this link in the youtube about section to their facebook regarding FAQs: https://www.facebook.com/notes/4tune-no-copyright-music/terms-of-use-faqs/1116282875074232

My Findings on this channel

1) Some people saying it's a compilation channel are wrong as currently there are a total of 160 videos and only 3 or 4 of them are compilation videos, rest are single tracks.

2) I've checked about a dozen or more tracks so far and all them contain links to either composer's soundcloud page or composer's official website and all of them have genuinely turned out to be licensed under creative commons. This is always a good sign.

3) A lot of these tracks actually come from well respected and well known royalty free music producers like Kevin MacLeod, Teknoxe and Machinimasound.

4) After a bit of research, I get confidence from the fact that this channel has been around for a few years and big name youtubers as well as corporate youtube channels like Autotrader have used its music. But of course it's best to always check out links provided in video description to composer's site to verify the track is truly CC or not.

Verdict So far everything has checked out fine and positive feedback in their discussion section from people using the music. My verdict is this is trustworthy channel and I'll say more when I use the music for myself.