Figured out how to update the Chromecast ultra firmware (i think). I joined the preview program in the settings, then pulled power and started again a bunch of times. Now I got
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![How to update Chromecast [all methods] - GChromecast Hub](https://googlechromecast.com/wp-content/uploads/2020/10/How-to-update-Chromecast.jpg "How to update Chromecast [all methods] - GChromecast Hub")
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![How to Update Chromecast Firmware [2021] - Chromecast Apps Tips](https://chromecastappstips.com/wp-content/uploads/2019/06/Update-Chromecast7-523x1024.jpg "How to Update Chromecast Firmware [2021] - Chromecast Apps Tips")
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/cdn.vox-cdn.com/uploads/chorus_asset/file/21924713/DSCF2108.jpg "Google updates latest Chromecast with more HDR controls and improved Wi-Fi performance - The Verge")
Google updates latest Chromecast with more HDR controls and improved Wi-Fi performance - The Verge
How to Update Chromecast 3rd Generation & Earlier - TechOwns
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