Today and every day of the 30-Day Eat Less Sugar Challenge, your goal in addition to watching this video is to eat less added sugar and replace added sugar with healthier whole, unprocessed foods.
Further reading of articles cited in this video:
Killer SC, Blannin AK, Jeukendrup AE. No evidence of dehydration with moderate daily coffee intake: a counterbalanced cross-over study in a free-living population. PLoS One. 2014 Jan 9;9(1):e84154.