Iridium by ParticleCore - Iridium is an extension built to improve the user experience on the new YouTube Material layout.
Video DownloadHelper - Browser extension to download videos from the Web
ImprovedTube - Allows you to improve and enhance Youtube visually or enable dozens of new features permanently or...
FastestTube - Youtube fastesttube downloader will make your internet expirience faster harder beter stronger.How to merge video and audio .
Enhancer for YouTube - Tons of features to improve your user experience on YouTube™!
ClipGrab - A friendly downloader for YouTube and other sites