Looking at a media studies path a bit before the invention of you tube, the most secure place professionals in the business have liked have been in music distribution sites. Not just sites with free uploads. Free upload sites might be good in a site to gather an opinion on a track, but not an idea to go with and make money off of.

You tube should not even be used for sales, especially with someone out to spread their wings in it.

It seems to be having secure channels and going through a process.
The internet doesn't seem to have one sure process for artists like it had before it.

I can't speak for major publishing companies since I have not gone their with it. But from what I have read in the posts, there is a lot of disappointment with that.

At Soundclick:
https://www.soundclick.com/artist/default.cfm?bandID=1468037
www.songcastmusic.com/profiles/mattbanx
Videos at youtube (Ads, editing film, and instrumental song docomenteries):
https://www.youtube.com/channel/UCGZj1g-Fb0HSN4PtzegjzIA