Ulozto.cz .. sharerapid.cz and similar servers, also through torrent and individual songs again directly from youtube.com well, but you know how downloading via torrents is illegal but in a way also through ulozto.cz, only it is somehow still tolerated if you have it for your own needs and not for public production. Otherwise, here is a list of the server
http://katalog.kompletne.cz/46-download-servery or there are direct programs, but they are not much, so I will not list them here. Ps; you do not need to install any extra program on your PC to download from youtube, just an extension for the browser in the additional inscriptions is needed. youtube mp3 downloader and then you just choose which one will suit you best I no longer use or add-ons for browsers again I do not download that much, so I need a perfect online converter I need this >>
http://convert2mp3.net/en/ ☢ ☢ ☣ ☠ ☣ ☠ ☣ ☠ ☢