Dr Harith bin Ramli explains the origins of the two main branches of Islam and how they have different views of the nature of Islam. Dr bin Ramli points out that while today, many think of these factions in conflict, for much of their history they could live side by side accepting their differences. Other videos you may find useful; Why Study Islamic Studies with Jon Hoover https://www.youtube.com/watch?v=cHdp4EsznGU