Amazon has been spending big in India to cement its dominance both in online retail and OTT video consumption. Now the ecommerce and cloud computing colossus has to face Walmart in both markets, as the world’s largest retail firm resorted to some dirty tactics this week with plans to roll out a free video streaming service for the Indian market. But as these two titans of the shopping world turn up the heat, will market frontrunner Hotstar feel the pressure? A few weeks back, reports claimed Walmart had identified an opportunity in the central states of the US where Netflix and Amazon Prime Video are apparently less popular than on the East and West coasts. Could it have established a…