  The Internet has recently witnessed the convergence of online social network
services and online video services: users import videos from content sharing
sites, and propagate them along the social connections by re-sharing them. Such
social behaviors have dramatically reshaped how videos are disseminated, and
the users are now actively engaged to be part of the social ecosystem, rather
than being passively consumers. Despite the increasingly abundant bandwidth and
computation resources, the ever increasing data volume of user generated video
content and the boundless coverage of socialized sharing have presented
unprecedented challenges. In this paper, we first presents the challenges in
social-aware video delivery. Then, we present a principal framework for
data-driven social video delivery approaches. Moreover, we identify the unique
characteristics of social-aware video access and the social content
propagation, and closely reveal the design of individual modules and their
integration towards enhancing users' experience in the social network context.
