User blog comment:Brandon Rhea/Intro to Wiki Modernization/@comment-27345308-20170306202834/@comment-20644-20170306205047

That's a placement we tested in our very first test on Harry Potter Wiki. We ran five different variants, including one with the video below the introduction. Another one, which was the largest placement, was HUGE and it ran across the entire top of the article, including the right rail.

The one we're running now (which, to me at least, seems like a happy medium in terms of size and general placement) was the most successful variant thus far. We'll keep testing placements now that we have a better sense of the basic type of video size and placement that got the best results.