The video talks about what depression is, how prevalent it is (a whopping 4.5% of Indian population) and what it's symptoms areDr Ashish Mittal also touched upon some indicators of depression, including feelings of sadness, anhedonia, lack of energy, negative thinking, failures and guilt, ideas of worthlessness, hopelessness, the person being scared of opportunities, lack of concentration and confidence.In addition to this, Dr Mittal touched upon some reasons behind depression, which can be both physiological like the deficiency of vitamin B12, hypo or hyperthyroidism, neurotransmitter imbalance and the imbalance of hormones like serotonin, or they can be psychiatric reasons, more or less related to anxiety and stress or some trauma.The overall purpose of the video is to make people understand that depression is more common than it is believed to be and can be treated well if the causal agent is identified.