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: over 1 year ago

Find some fitting music to use in your videos. Source: almost 2 years ago

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

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

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

You need a usenet provider like Fastusenet or whatever you prefer, then you need a client like sabnzb and then a search provider like NzbGeek. Source: about 1 year ago

Get sabnzbd, this is kind of like your torrent client, you use this to download the .nzb files, there are many more clients if you prefer another one, here is the tutorial on how to setup SabNZBd. Source: about 1 year ago

If you use an NNTP provider, you also need sabnzbd. It integrates into Sonarr/Radarr and pulls NZBs from your NNTP provider(s) and reassembles them, including searching across other providers for missing parts, and using PAR files to repair broken files. Source: over 1 year ago

You're going to have a bad time if you don't use sabnzbd instead. Source: over 1 year ago

SABNZBD has a Linux version. Depending on your needs (and we'll leave it at that) you may need "other stuff" to go in conjunction with it. Source: over 1 year ago