Does casting from one device to another consume bandwidth?

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BrettL wrote:
I have a Kindle Fire as well as a Fire TV. I have downloaded movies onto my Kindle Fire.

If I use my HughesNet wireless router to allow those two devices to communicate so I can "cast" a movie onto my TV, will it use up my precious, limited bandwidth?

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As long as it doesn't connect to the Kindle server and re-download the information, it shouldn't use any data.  It will be, more or less, like when one's printer is connected via the HughesNet modem's WiFi and they print something.  The print info is just passing through the local network, not going online.  

I'd recommend checking the Usage page on the HughesNet My Account site on a separate device.  I'd wait for a minute or two to ensure the data is caught up, then refresh the Usage to show what you currently have.  Then leave the Usage page open.  Then, with your Kindle fire, cast a bit of a movie to your TV.  Say five minutes, then stop.  Then go to your still open Usage page and refresh the Usage to show current.  If you see any change, you know it's being counted.  If you don't, you'll know it isn't.  Again, it shouldn't, but we have seen an odd instance of a device casting to a TV, but while doing so it was actually causing the movie to be downloaded again, using data, instead of casting locally.  It was the only time I'd seen this, and I can't find the thread to find out what the resolution was.  It wasn't Kindle, though.  It also may have just been a setting or something in the casting device's software.  I think it was Chromecast, though I'm not positive of that. 

To refresh the Usage on the Usage page, click the button you see in the red box in the picture below.  Make sure to leave the Usage page open when you cast, as having to reopen the page afterward to check your data will in and of itself use data.  If it's still open it won't, and you can just refresh the numbers to see if any data was used during the short casting session.  :)

Hope this helps.  :)