If you're looking for a deep dive into the world of online video, specifically the "Mega" ecosystem (like the defunct MegaVideo and its successors), the most relevant academic work is

This paper provides a fascinating look at the technical and economic infrastructure of online video streaming during the era when MegaVideo was a dominant player. Key Insights from the Paper Infrastructure of Piracy

, its successor, which focuses on secure cloud storage and file management rather than public video streaming Below is a review of the current MEGA (mega.io)

Bottom line: While you won't find a working "MegaVideo online" anymore, its legacy lives on in how we consume streaming media today—fast, free, and on-demand.

2. Premium Alternatives

• Netflix & Hulu: The direct descendants of what Megavideo started.
• YouTube Free Movies: YouTube now hosts thousands of classic films legally, with ads.