Of course, I always do, too.
Funny thing is that some of this stuff wouldn't be worth watching at 1x, but are worth watching on 2.5x. For example I really enjoy watching replays of strategical games, but much of it is frankly quite boring in real time. Take a typical 2+1 hour game of chess, with minutes between moves, condensed into a 45 minute match with commentary, that's an excellent way for me to enjoy relaxing after a day of work while the washing machine is churning and I'm eating dinner. But I'd absolutely have no time (much less interest) to sit there for 3 hours watching people think.
You have to wonder, what are the odds that all of human content is paced at a perfect speed for all of human consumers?
What are the odds that every lecturer for example, speaks at the same pace, all with the same information density of the concepts they are talking about?
The answer obviously is virtually zero. And so if you have different paces of information density, then the norm should be for every individual that for some content, you adjust the speed of the video!
Some videos pack a ton of information in five sentences, others take ten sentences to convey the same idea. (a density of concepts per sentence) And some lecturers pack those say five sentences in one minute, while others do it in two. (speed of speech) If everyone enjoyed the same pace, and all content was at the same pace, then you'd never have to adjust content-speed. But both of those two statements aren't true. So again, the norm should be that any individual may want to speed up at least some of his content.
In the end it really depends on the content. I don't speed up movies as much for example as news though because in the former, moments of quietness and facial expression are much more meaningful than in the latter and it loses its impact when sped up too much.