A: That video is either a pre-rendered fake, footage from the closed beta (which still required online), or a different game entirely (like Grim Dawn with a Diablo IV UI mod).
If you are looking for in the context of games like Diablo IV , here are some relevant academic themes and example papers you might find useful: diablo iv repack
There is a small niche of developers creating "Diablo IV repack emulators" (like "Diablo IV - Russian Emulator" or "War(fork)"). These repacks modify your hosts file to redirect Blizzard’s login to a fake local server. A: That video is either a pre-rendered fake,
: Diablo IV is an "always-online" live-service game. Its core logic resides on Blizzard's servers. Unlike traditional single-player games, a repack cannot easily provide the full game experience (leveling, loot, world events) without a connection to official or private servers. : Diablo IV is an "always-online" live-service game
Information Economics and Policy