Some roughly ideas

Literature review of caching, and segmentation of video

A more generally perspective might be useful, Look at it from a
content node perspective, a CDN perspective, and even a user's
perspective... What happens when we serve many files at once.
Paint a whole picture. This would make a good collection of
work for Andrew's Ph D? which could be titled “How do you
pre-fetch interactive media in CDNs”. which would include work
on how to adapt to different workloads. Competing media and
competing workloads.