Science and Futurism with Isaac Arthur
This channel focuses on exploring concepts in science with an emphasis on futurism and space exploration, along with a healthy dose of science fiction. While we explore many concepts and technologies that are far beyond us now, we try to keep everything inside the bounds of known science or major theories.
Meh, I saw documentaries listed but didn't catch that they weren't looking for those specifically. Doesn't matter the OP isn't the only one in this thread and so it's here in case someone else finds it interesting.