What you are witnessing after about 25 minutes into the boiling (1:40 in the video) is the product after the water has evaporated from the Coca Cola and the sugar has gone through the hard-ball stage, likely above 250F which is the stage where the sugar concentration is high and there is very low moisture in the sugar syrup. You're primarily left with the sugar/sucrose (if you're in the UK or Canada) or high fructose corn syrup (in the US).
The video states (translated from Spanish) "this is what you are drinking...think about it"
carbonated water, sucrose, caramel color, phosphoric acid, natural flavors, caffeine
carbonated water, high fructose corn syrup, caramel color, phosphoric acid, natural flavors, caffeine
carbonated water, sugar, colour (caramel E150d), phosphoric acid, natural flavourings (including caffeine).
Check out 20 Established Uses For Coke Proves It Does Not Belong In The Human Body
April McCarthy is a community journalist playing an active role reporting and analyzing world events to advance our health and eco-friendly initiatives.