this post was submitted on 01 Dec 2025
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You need the phone for any controls issued to the Chromecast like volume, subs, pause, seek, etc.. But you don't strictly need it once the video has started playing, presuming you're not using any control commands.
Thanks for the details, seems like that may be why the older Chromecasts are still supported.
I mean, you still need it, the phone has to be on and connected to the same wifi as whatever it's casting to.
Nah you can turn the phone off once the video has started. I only know this because my kids have regularly failed to charge the 'phone that we only use for Chromecast to the tv' and it sometimes dies while they're watching something. Keeps playing until the end.