The requirement to provide permission for it to "Access your data for all websites" is my only qualm with this extension. As it only needs to work on YouTube I would have thought it would only need permission to work on YouTube (c.f. Control Panel for Twitter, for example, where that extension only requires permissions to access data for *.twitter.com and *.x.com). But it's possible there are architectural reasons why Alphabet make this more difficult. Apart from that one concern, this extension appears to work well in removing the extreme volume of advertising which makes YouTube otherwise unusable for me.