This video breifly explains water soluble vitamins (B1, B2, B3, B5, B6) on their names, structures, general properties, biological functions, excess and deficiency, food sources as well as stability.

00:59 Vitamin B1 (Thiamine)
04:35 Vitamin B2 (Riboflavin)
07:59 Vitamin B3 (Niacin)
11:39 Vitamin B5 (Pantothenic acid)
14:49 Vitamin B6 (Pyridoxine)