[garyng]

I have this extension too, I usually watch videos at 2x (a way to be "productive" while watching youtube videos ). But I wonder how can one watch at 4x/6x...

[swaggyBoatswain]

The secret is captions. You speed read through videos. I still watch most dense tutorials at 2x speed though, and TV shows at 1x speed

[superasn]

I think it's a matter of habit and the more you do it the easier it gets (like training a muscle). 4x is very useful when watching video tutorials (lynda, udemy, etc) and generally I'm able to understand everything including the audio.

6x is when I just want to see the slides and code but can't understand the audio. It's rare but sometimes very useful.