As per given information, your requirements are normal. Any of our Linux shared hosting package will satisfy the above requirements. At our hosting, we use  high end configuration with good amount of bandwidth for our shared servers which will definitely  hold multiple videos, images and simultaneous user connections at the same time which is keen requirement of Drupal as well as Social Networking websites. The above modules are by default installed on our shared servers. A well established website on Drupal may utilize more resources. Thus you will need to take care of your scripts in order to smooth running. As your business grows you will need to upgrade your package to our VPS and thereafter dedicated server.