Streaming videos over the Internet is a multi-billion-dollar industry and it is rapidly growing. This is due to the proliferation of new types of multimedia content such as 4K videos and immersive content such as multiview and 360-degree videos. These new multimedia contents are becoming popular because they offer high-quality and unprecedented experiences to users. For example, multiview videos allow users to explore scenes from different angles and perspectives, whereas 360-degree videos put users in virtual scenes that can be navigated. As the popularity of immersive videos increases, the amount of multimedia traffic distributed over the Internet increases at high rates. Thus, major ISPs need to efficiently carry and manage larger volumes of multimedia traffic through their networks. My recent work focused on two aspects of multimedia systems: (i) the adaptive streaming of multiview videos, and (ii) the traffic engineering and content placement of multimedia content.