Shazam! director David F. Sandberg explains how exactly test screenings work.  Before helming the latest DCEU flick starring Zachary Levi as the titular character, Sandberg was objectively late from debuting as a filmmaker with his 2016 movie Lights Out based on his 2013 acclaimed short of the same name. From then, he was tapped to direct The Conjuring Universe spin-off, Annabelle: Creation which rolled out in 2017, and then eventually landing the superhero gig. Despite only putting three big screen productions thus far, Sandberg has a list of short movies under his portfolio, the first of which dating back all the way from 2006.

Sandberg's first taste of popularity came from experiencing moderate online success more than a decade ago with his animated movies. And he is taking fans back by producing a slew of content reminiscent of his earlier work - the latest of which offers fans more information on how test screenings are important to films.

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The educational animated video that has been shared on Sandberg's (also known as ponymasher) official YouTube channel informs people of the importance of test screenings. The clip which runs a little bit longer than six minutes goes in-depth with how the whole thing is set up - from recruitment of partakers to what's usually shown. It also shines a light on how the data collected from these screenings affect a film. Watch the video below:

Over the last few years, test screenings have been a major source of conversation among fan communities, especially when it comes to blockbuster films. As Sandberg explains in his video, the response they get from them allows filmmakers to craft their movies in a way that will be more palatable for the general viewing audience. It also helps the marketing team to properly plan a strategic campaign to efficiently sell the upcoming big screen production. In the clip, the director also touched on studio executives' perspective on test screening results, and how that can ultimately affect what the final product will be. This is particularly relevant at this point considering that the public has heard multiple reports about a movie significantly changing course due to the bad outcome from test screenings.

There's a plethora of educational essays on YouTube, and Sandberg's recent upload is by no means new. But what's unique about it is that it's from someone who's actually in the industry, so he knows and more likely experienced what he talked about in the clip. He presented it in a digestible way that's both fun and informative. Hopefully, he releases more videos like this on his YouTube page in the future as it gives the public - whether aspiring filmmakers or casual movie lovers - an insight on the intricate process of moviemaking.

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Source: David F. Sandberg

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