User blog comment:Brandon Rhea/Intro to Wiki Modernization/@comment-27755354-20170306215031/@comment-27345308-20170306223123

I don't think pre-roll ads == autoplaying ads. Pre-roll ads are when an ad plays for a few seconds before playing the requested video. Autoplaying would mean the video plays on page load, and I don't remember Brandon mentioning anything about them. Maybe I'm incorrect, though.