It's worse. YouTube will autoplay "next", "next", "next" videos once you stopped watching the video of interest and didn't bother the close the browser's tab.

It's worse. YouTube will autoplay "next", "next", "next" videos once you stopped watching the video of interest and didn't bother the close the browser's tab. This way youtube will suck your bandwidth and resources to force-run dozens to hundreds videos through your computer and internet connection. This will allow Youtube to inflate actual view count numbers and defraud both the publishers and the advertisers.