I've been using this extension for long time and it has changed my relationship to video content. I still prefer text to skim through and read at my own pace, but having keyboard shortcuts for video that work across all pages changes the game.

Long talks no longer seem daunting because speeding up and rewinding becomes like a second nature. I use the speed step of 0.1x and rewind step of 3 seconds for fine control, the default values were too imprecise. Maybe I should start slowing down songs I enjoy?