South Indian Bank has launched a new ad campaign titled 'Khushiyaan Badhao Diwali Maanao' based on the lender's philosophy. The film is set at a Diwali Open Mic event, where the protagonist asks. South Indian Bank has launched its Diwali campaign film, rooted in its core brand philosophy of 'Investing in Relationships’. South Indian Bank has launched its multilingual Diwali campaign film rooted in its core brand philosophy of ‘Investing in Relationships’.