Used Adblocker Ultimate's Block Element before, but youtube did a lot of work to circumvent that, changed their page structure to dynamically load page parts so that Addblocker cannot properly block the annoying propaganda parts of youtube pages. I got so tired of youtube constantly pushing unwanted garbage, and was so lucky to find this extension. It works well, and offers even more features than I hoped for. Basically I only want to see the content created by the video author and nothing else, and this extension helps me achieve exactly that. Thanks to the extension developer!