Ccmixter.org have a ton. Also soundcloud. Aside that the usual ways like Youtube.Also keep an eye for remix contests. Plenty of good vocals from a few well know projects/bands for free ,a chance to get featured and earn some $ or other prizes. Source: about 1 year ago

Find some fitting music to use in your videos. Source: over 1 year ago

Creative commons remix community (some are non-commercial): ccmixter.org/. Source: almost 2 years ago

For Free and non-copyrighted samples: CCmixter and Freesound. Lots of good stuff there. Source: almost 2 years ago

Http://ccmixter.org/ tons of music with a variety of creative commons licenses. Source: almost 3 years ago

I extracted the vocal stem using melody.ml so they already aren't great quality, right now I just have some basic equing and Soundgoodizer preset A on the master. Source: 10 months ago

Download his songs off youtube and then import em into melody.ml. Source: 12 months ago

Since it seems pretty similar to 302 you could also isolate the frequencies or extract all the parts to see how he mixed it. melody.ml is a decent way to have a quick look at volume levels and sounds used IMO. Source: about 1 year ago

Have a wav or mp3, you could download from youtube using https://yt1s.com Remove vocals using Https://melody.ml Or for a download version: Https://makenweb.com/SpleeterGUI. Source: about 1 year ago

I'd study every single record of Midnight Star, D-Train, Shalamar, all that kind of stuff. Use https://melody.ml/ to isolate the bass so you can really hear what's going on. Source: about 1 year ago