Not much use... Worked for a day, next morning when the machine was re-booted offending videos/channels were back and the 'X' had stopped working! - It was there, it had just stopped doing anything other than flickering when clicked! - It's also not easy (or maybe not possible) to get it to just tackle YouTube's recommendations without completely blocking channels! - Just, no good... What I really need is a one-click blocker that also sends YouTube the 'not interested' message - and doesn't die after 24 hours!