4kdownload

4K YouTube to MP3

4K YouTube to MP3 allows to download audio content from YouTube and other services in the high quality as fast as possible and to save it as mp3 on your computer.

• 4kdownload.com  ^(рус.)

• https://en.wikipedia.org/wiki/4K_Video_Downloader
• https://en.wikipedia.org/wiki/4KDownload

• http://sngsnick.com/2014/12/4k-video-downloader-345-youtube.html  ^(рус.)