Seeking Help Does Chromecast uses double bandwidth?

[sumitroy]

Same should happen on Hotstar and Netflix app too?

Not sure about Hotstar, but Netflix yes.

 

[Esmail]

Supposedly I play a movie on Hotstar using Chromecast on my tv. Will the internet be consumed for movie on both tv and my phone?

Only your broadband data will be used through wifi in this case, your mobile will only act as a remote to control the playback and no cellular data will be used.