A while ago, YouTube started to automatically play the Next video after your current one was finished. I didn’t notice the Autoplay setting to be persistent after browser sessions as between tabs it isn’t synchronised and I hardly restart my browser (as I usually have like a hundred research tabs open).
So I adapted the steps from: How to turn off YouTube’s new autoplay feature – CNET
To disable the feature, click the blue Autoplay slider switch that sits at the top of the right-hand column of Up Next videos. It’s that easy, and when I turned it off, YouTube remembered I did so after both browser and system restarts.
Into:
–jeroen