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Campuses also have this kind of security. I can't use a Chromecast or a Google Home on my college campus because my school's IT team blocks all DNS servers except their own.

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I used to travel with a Chromecast so I could cast in my hotel room. I finally gave up, since it never worked in any hotel I stayed in.

I did the same thing and gave up too, but that's because every hotel TV used composite video.

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