Sea Dragon - The Saturn V's big brother?

From a channel Lumen includes in full: Eager Space, run by a software engineer and longtime spaceflight analyst, breaks down launch vehicles, propulsion and orbital problems (Kessler syndrome, nuclear electric propulsion) with numbers, history and sources.

A 15-minute video from Eager Space's catalogue; the title names its topic.

Video by Eager Space, played through YouTube's embedded player.