As far as I know, there is a setting somewhere under the settings when using the normal web interface. Use a browser to find and disable it. Hopefully the iOS app will then honour the setting.

While the web interface does have the option to disable video autocontinue, the iOS app does not honor that setting. I have the option turned off yet autocontinue still happens in the app.

JC, that's not good at all! I remember when they just added the autoplay to the web interface, I immediately complained, because bandwidth costs a lot here in South Africa. Shortly after that they added the option to turn it off. You would think they would take such issues into account for the App versions as well. I haven't checked if my Android App also does that because I'm still trying to sort out a different issue with the App - it doesn't show anything as completed even though it does show my points and badge counts correctly.

The Android app does not autocontinue for me, and I don't think it ever had that feature

Today I have had a TERRIBLE time with this.  or something similar. I watched a video on Order of Operations - and was DESPERATELY trying to read through the comments and answers. I had a question - but was trying to see if the question had been answered already. Withing about 8 seconds after the video was finished, it moved me on to the next section. I could NOT stay on the comments - or expand the comments to read more. I tried scrolling with the mouse, with my finger on the screen, and any other way I could think of.  I couldn't read or interact with the comments between sections of the lessons.  Any tips?  I wanted to ask a question there - if possible.

I have the exact opposite problem. I used to have autoplay but somehow switched it off, I want to switch it back on but cannot figure out how.

And now, on the web interface, when you are on a video page and click on a different video, that video auto-starts; again wasting my bandwidth if I just wanted to check questions, etc. It's like the IT guys just keep changing things with no apparent reason visible from our side - IT WORKED JUST FINE as it was - why change it???

Just found the configuration at https://www.khanacademy.org/settings/account to disable it: