NetVideoHunter VS Bulk YouTube video Downloader

Video DownloadHelper - Browser extension to download videos from the Web

FastestTube - Youtube fastesttube downloader will make your internet expirience faster harder beter stronger.‎How to merge video and audio .

FlashGot - FlashGot is a browser extension for Mozilla Firefox that is designed to make it easy to download a whole batch of files in one go. The extension is open source and free to use, but it is no longer compatible with the most recent version of Firefox.

Flash Video Downloader - Flash Video Downloader is a popular extension for Google Chrome browser for downloading wide range of files over the internet.

ClipGrab - A friendly downloader for YouTube and other sites

Video Downloader All - Video Downloader All is the name of a free to use and state of the art downloader that is available in form of extension for Google Chrome web browser.