Question Can't mirror downloaded video files to TV via HDMI

Apr 9, 2019
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I have downloaded videos to my Chromebook via Starz and Netflix apps. When I plug my Chromebook into my TV via HDMI the screen mirrors properly, audio and video both work. However when I try to play one of the downloaded videos from either app I get audio through the TV but no picture. This issue only occurs with downloaded files. Any help would be greatly appreciated. Thanks