I use a Samsung Galaxy S5. I'd like to play YouTube videos (or videos anywhere else) at 2x speed, but I can't find any options for that.
Is it possible to find a way to do this on Android?
Update 2017: It is now also possible to change the speed in the YouTube app, by clicking the three dot menu when playing a video, and then selecting Playback Speed
Other ways:
Sharing the video to an external app
Download an external player that lets you control the speed, like BSplayer.
Then in the youtube app when you get to the video you want to watch click the Share button and then select the player you want to use. The external player will open and it will play the video you want, and you can control the speed in it.
Tip: you can also use this method to skip ads. If you share the video to a different player you can watch it right away without having to wait if there's an ad.
Edit: I mentioned VLC and Dice Player as other options to control video speed, but looks like I can't share a video from the youtube app to play with them, at least on my phone
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Using YouTube in a browser app (like Chrome) and running JavaScript
This works for watching videos on m.youtube.com on the Mobile Chrome browser (probably other browsers as well)
When a video is playing, enter this into the URL bar
javascript: document.querySelector('video').playbackRate = 2
Note: you have to type out the "javascript:" keyword, because the browser might remove it if you paste it
You can use any number for the playback rate, including decimals
Tip: Speeding up videos this way could get laggy if you use a slower phone, and the max speed you are able to watch it smoothly might depend on your device capabilities. For this, you can also select a lower resolution for the video, or in the phone browser select Desktop Mode and then select a lower resolution video.
Saving the code as a Bookmarklet
You can save JavaScript code in a bookmark (called a bookmarklet) so you don't have to enter it in the url bar
Create a bookmarklet, name it something like 'ySpeed', and paste this code into it, I added a prompt so it asks to "Enter the Rate" each time it is run:
javascript: document.querySelector('video').playbackRate = parseFloat(prompt("Enter Rate"));
then on your phone when you're watching a video on m.youtube.com, type 'ySpeed' into the URL bar, don't press enter, you should see your bookmarklet pop up as an option. When you tap it the code will run and you will see a popup to enter your speed (.5, 2.5, 3, etc)
Instructions for Creating a Bookmarklet:
You can create it from your desktop browser or from your phone browser
On Desktop
On Mobile Chrome
Some more info on bookmarklets: http://www.labnol.org/software/google-chrome-bookmarklets/27894/
As of 2014, the YouTube app does not have that feature.
However, it's available if you use a browser in desktop mode. Here's what it looks like on Chrome (on desktop mode):
Request desktop site
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Commented
Oct 9, 2014 at 18:12
You can download movies and play them with an external player, for example, Dice Player (which has a speed control).
But downloading from YouTube is illegal. Can be done with TubeMate.
Be aware, TubeMate is censored and no Google tool will help you to find the right version.
Just in case anyone still has this question, I should probably mention that at least since September 2017, it is now possible to control playback speed in the official YouTube app. Just tap the menu button in the top-right corner of the video and the setting will show up:
For playing YouTube videos on 2x speed, I use the BS Player (available on the Play Store). I open the video on the YouTube app and then I share it to the BS Player, which has speed control. With a good internet connection it should run very smoothly. (I also tried playing it with Chrome on desktop mode, but it has an awful delay for me.)