These Add-ons have intrusive ads, but mine does not have any !
See kids, if you sell a banana at twice the price just because you think your banana is quite special,chances are ,no one is buying it,especially if you're shop is located in between a bunch of banana farmers.The plugins you're selling are not needed. Simple,fast, HD and without installation YT downloader
http://en.savefrom.net/1-how-to-download-youtube-video/This plugin just saves time from jumping webpages to get to the download sites.