SeFrom.net helper lets you download video and music from YouTube.com, FaceBook.com, Vimeo.com, Daylimotion.com, VK.com, Soundcloud.com and more than 40 others just in one click.
-= HOW TO DOWNLOAD VIDEO=-On the page where you watch a video file, the "Download" button appears, and allows you to se video in the quality required.
-= FEATURES =-+ download music, video and pictures+ download all mp3 files from the page+ check the audio file bitrate and filesize + se the playlist to the computer (to listen it later via your player).
List of supported resources:http://en.sefrom.net/faq.php#supported_resourses
All the additional information can be found on the extension support page.