I think Tata is the good and also it is cheap as compared to others like airtel, vodafone ....other than this, you should choose any local broadband connection it is much cheaper than dongle. For temporary use you can take one dongle of any brand.
Your video should have the content what most of the people like to see, and what your duty is to share the links on the social media sites to invite the people to play the video.
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