An in-depth survey of the various technologies for spaceship propulsion, both from those we can expect to see in a few years and those at the edge of theoretical science. We'll break them down to basics and familiarize ourselves with the concepts.
Note: I made a rather large math error about the Force per Power the EmDrive exerts at 32:10, initial tentative results for thrust are a good deal higher than I calculated compared to a flashlight
Watch the video version:
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Music by:
Dexter Britain
"Seeing the Future"
Frank Dorittke
"Morninglight"
Dexter Britain
"After The Week I've Had"
Chris Zabriskie
“Mario Bava sleeps in a little later than he expected to”
Kvazar
"Koalips"
Kai Engel
"Snowfall"
Kevin MacLeod
“Spacial Winds”
Phase Shift
“Forest Night”
Brandon Liew
"Into the Storm"

The Spaceship Propulsion Compendium

A Moon Base may be built within a generation, but long term colonization will take many more. As more people travel and immigrate their, establishing more lunar colonies, tension between them and Earth could lead to conflicts and possibly even warfare.

Watch the video version of this episode: https://youtu.be/Bh03GxRndeI
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Battle for the Moon
Episode 160, Season 4 E46

Writers
Isaac Arthur

Editors
A.T. Long
Daniel McNamara
Darius Said
Edward Nardella
Jerry Guern
Keith Blockus
Matthew Acker
Matthew Campbell
Mark Warburton
Oliver Epsom
Steve Nixon
Stuart Graham https://beyondnerva.wordpress.com

Producer:
Isaac Arthur

Cover Artist:
Jakub Grygier https://www.artstation.com/jakub_grygier

Graphics Team
Fishy Tree https://www.deviantart.com/fishytree/
Gateway Foundation
Jeremy Jozwik https://www.artstation.com/zeuxis_of_losdiajana
Katie Byrne
Ken York of YD Visual https://www.facebook.com/YDVisual/
Kristijan Tavcar https://www.miragedereve.com
LegionTech Studios https://hades9.com
Mike Munt http://www.apogii.uk
Sergio Botero
Space Resources CGI

Narrator:
Isaac Arthur

Music Manager:
Luca DeRosa  - lucaderosa2@live.com

Music:
Ayreon, "Planet Y is Alive!" https://www.youtube.com/channel/UCihO6uVisilu1mn4x2u-HOA
Kai Engel, "Endless Story About Sun and Moon"  https://www.kai-engel.com/
Aerium, "The Islands moved while I was Asleep" https://www.youtube.com/channel/UCRnUJY3l5vIJFGsY3XvW4dQ
Stellardrone, "Eternity" & "Breathe in the Light" https://stellardrone.bandcamp.com
Dracovallis, "For the King!" https://dracovallis.bandcamp.com/

Battle For The Moon

Black Holes are often considered the greatest dangers to spaceships in science fiction, but they may turn out to be the perfect power source for future spaceships.

Watch the video version: https://youtu.be/oAocMzxPjjo
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Check out PBS Spacetime's episode on Hawking Radiation: https://www.youtube.com/watch?v=qPKj0YnKANw
Toth's Black Hole Calculator: https://www.vttoth.com/CMS/physics-notes/311-hawking-radiation-calculator
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Credits:
Generation Ships: Black Hole Ships
Episode 184, Season 5 E18

Written by:
Isaac Arthur

Editors:
Darius Said
Keith Blockus
Matthew Acker
Mark Warburton

Cover Art:
Jakub Grygier https://www.artstation.com/jakub_grygier

Graphics by:
Fishy Tree https://www.deviantart.com/fishytree/
Jarred Eagley
Jeremy Jozwik https://www.artstation.com/zeuxis_of_losdiajana
Justin Dixon
Kris Holland (Mafic Studios) www.maficstudios.com
LegionTech Studios https://hades9.com
Luca DeRosa
Mihail Yordanov

Produced & Narrated by:
Isaac Arthur

Music Manager:
Luca DeRosa - lucaderosa2@live.com

Music:
Markus Junnikkala, "Plotting a Course" https://www.markusjunnikkala.com/
Denny Shneidemesser, "Light & Darkness" https://soundcloud.com/denny-schneidemesser
Miguel Johnson, "Darkness falls" https://soundcloud.com/migueljohnsonmjmusic
Paradox Interactive, "Spatial Lullaby" https://www.paradoxplaza.com
Chris Zabriskie, "Readers Do You Read" http://chriszabriskie.com
Stellardrone, "Fermi Paradox" https://stellardrone.bandcamp.com
Ross Bugden, "City Lights" https://www.youtube.com/channel/UCQKGLOK2FqmVgVwYferltKQ
Markus Junnikkala, "We Roam the Stars" https://www.markusjunnikkala.com/

Black Hole Ships

Space is an awesome place filled with virtually infinite wonders to explore, and human colonization will likely make far more. It may soon be possible for people to journey up to orbit as tourists, and in the more distant future this might become a vast trade, with tourism in Space Station Hotels or on the Moon or Mars or traveling to countless other planets, moons, asteroids, or megastructures.

Watch the video version: https://youtu.be/-YebEDmbG_M
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Credits:
Outward Bound: Space Tourism
Episode 194, Season 5 E29

Written by:
Isaac Arthur

Editors:
Jerry Guern
Matt Campbell

Cover Art:
Jakub Grygier https://www.artstation.com/jakub_grygier

Graphics by:
Bryan Versteeg http://spacehabs.com
Fishy Tree https://www.deviantart.com/fishytree/
Gateway Foundation https://gatewayspaceport.com/
Jeremy Jozwik https://www.artstation.com/zeuxis_of_losdiajana
Katie Byrne
Ken York https://www.facebook.com/YDVisual/
Kristijan Tavcar https://www.miragedereve.com
Kris Holland (Mafic Studios) www.maficstudios.com
Sam McNamara
Sergio Botero https://www.artstation.com/sboterod?fref=gc

Produced & Narrated by:
Isaac Arthur

Music Manager:
Luca DeRosa - lucaderosa2@live.com

Music:
Markus Junnikkala, "Hail the Victorious Dead" https://www.markusjunnikkala.com/
Aerium, "Windmill Forests" https://www.youtube.com/channel/UCRnUJY3l5vIJFGsY3XvW4dQ
Markus Junnikkala, "Always tell me the odds" https://www.markusjunnikkala.com/
Chris Zabriskie, "Stories about a world that once was" http://chriszabriskie.com
Paradox Interactive, "The Titan" https://www.paradoxplaza.com

Space Tourism

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In the future humanity might build structures of incomprehensible size and splendor, megastructures and artificial worlds, but somebody is going to have to build and maintain these feats of science and engineering and clean up all the orbital debris.

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Credits:
Megatructure Maintenance & Space Janitors
Episode 199, Season 5 E34

Written by:
Isaac Arthur

Editors:
Jerry Guern
Keith Blockus
Mark Warburton
Olly Epsom

Cover Art:
Jakub Grygier

Graphics by:
Bryan Verteeg
Darth Biomech
Fishy Tree
Jarred Eagley
Jeremy Jozwik
Justin Dixon
Katie Byrne
Ken York
LegionTech Studios
Mike Munt of Apogii
Sergio Botero

Produced & Narrated by:
Isaac Arthur

Music Manager:
Luca DeRosa

Music:
Markus Junnikkala, "We Roam the Stars" 
Lombus, "Amino" 
Ross Bugden, "Ascension & "Interstellar" 
Stellardrone, "On A Beam Of Light" 
Aerium, "The Islands moved while I was asleep" Markus Junnikkala, "Always Tell Me The Odds"

Megastructure Maintenance & Space Janitors

Science fiction delights in showing us brave adventurers boarding abandoned spaceships, exploring ancient alien worlds and space hulks, or surviving on planets turned into giant garbage dumps, but how realistic is this idea? And what sort of civilizations and cultures might spring up around such efforts?
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Credits:
Space Derelicts & Trash Worlds
Episode 201, Season 5 E36

Written by:
Isaac Arthur

Editors:
Keith Blockus
S. Kopperud

Cover Art:
Jakub Grygier

Graphics by:
Bryan Versteeg http://spacehabs.com
Fishy Tree https://www.deviantart.com/fishytree/
Jarred Eagley 
Jeremy Jozwik https://www.artstation.com/zeuxis_of_losdiajana
LegionTech Studios https://hades9.com
Ken York https://www.facebook.com/YDVisual/
Mihail Yordanov
Sergio Botero https://www.artstation.com/sboterod?fref=gc

Produced & Narrated by:
Isaac Arthur

Music Manager:
Luca DeRosa  - lucaderosa2@live.com

Music:
Scott Buckley, "Red" http://www.scottbuckley.com.au
Marcus Warner, "In Arcadia" 
Chris Zabriskie, "Unfoldment Revealment Evolution Exposition Integration Arson" http://chriszabriskie.com
Serena Elis, "Science" https://soundcloud.com/serenaelis
Kai Engel, "Soli"  https://www.kai-engel.com/
Denny Schneidemesser, "Luminous Rays" https://soundcloud.com/denny-schneidemesser

Space Derelicts

From the most basic rockets to future ships designed for interstellar or even intergalactic flight, spaceship design is all about mission purpose, available technology, and keeping your crew safe and comfortable. 

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Credits:
Spaceship Design, Episode 212, Season 5 E46

Written by:
Evan Schultheis
Isaac Arthur
Victoria Kelly

Editors:
Darius Said
David Schultz
Derek Hightower
Jerry Guern
Keith Blockus

Cover Art:
Jakub Grygier https://www.artstation.com/jakub_grygier

Graphics:
Bryan Versteeg http://spacehabs.com
Darth Biomech https://www.artstation.com/darth_biomech
Fishy Tree https://www.deviantart.com/fishytree/
Jeremy Jozwik https://www.artstation.com/zeuxis_of_losdiajana
Sam McNamara
Sergio Botero https://www.artstation.com/sboterod?fref=gc

Produced & Narrated by:
Isaac Arthur

Music Courtesy of Epidemic Sound
http://epidemicsound.com/creator

Spaceship Design

As we pioneer our way out from Earth to other planets and eventual the stars, our concept of time will change in more ways than just different calendars. We'll explore how interstellar civilizations might cope with everything from relativity to life extension and how century long voyages and time lags of communication over millions of worlds might be managed.

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Credits:
Interstellar Civilizations & Time
Episode 218, Season 5 E52

Written by:
Isaac Arthur

Editors:
Cooper de Ruiter
Darius Said
Keith Blockus

Cover Art:
Jakub Grygier https://www.artstation.com/jakub_grygier

Graphics:
Bryan Versteeg http://spacehabs.com
Fishy Tree https://www.deviantart.com/fishytree/
Jeremy Jozwik https://www.artstation.com/zeuxis_of_losdiajana
Sam McNamara

Produced & Narrated by:
Isaac Arthur

Music Courtesy of Epidemic Sound http://epidemicsound.com/creator

Interstellar Civilizations and Time

Science fiction loves to take us to desolate alien worlds with low-gravity, and envision creatures evolved to those or humans adapted to those conditions or zero-gravity in space, and many planets we might one day colonize like Mars do have low gravity... but our assumptions about life on such places correct or what if we're making incorrect assumptions?

Don't forget to check out What If's channel: https://bit.ly/youtube-What-If 
Watch the video version: https://youtu.be/CBLCNWpLFBg
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Credits:
Life on a Low-Gravity Planet
Episode 231; Mar 26, 2020

Written & Produced by
Isaac Arthur

Editors:
Cassandra Graham
Darius Said
Jerry Guern
Keith Blockus
Saida Mir

Narrators:
Isaac Arthur
Peter of What If
Get a free month of Curiosity Stream: http://curiositystream.com/isaacarthur
The  Zoo Hypothesis is a Fermi Paradox solution that assumes extraterrestrial civilizations can't be detected by our SETI efforts because they keep our whole world in an Alien Zoo.

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Listen or Download the audio of this episode from Soundcloud: Episode's Audio-only version: https://soundcloud.com/isaac-arthur-148927746/fermi-paradox-zoo-hypothesis
Episode's Narration-only version: https://soundcloud.com/isaac-arthur-148927746/fermi-paradox-zoo-hypothesis-narration-only


Credits:
The Fermi Paradox: Zoo Hypothesis 
Episode 228; Mar 5, 2020

Writers:
Isaac Arthur

Editors:
Darius Said
Jerry Guern

Produced & Narrated by:
Isaac Arthur

Cover Art:
Jakub Grygier https://www.artstation.com/jakub_grygier

Graphics:
Jeremy Jozwik https://www.artstation.com/zeuxis_of_losdiajana
Kris Holland (Mafic Studios) www.maficstudios.com
Kristijan Tavcar https://www.miragedereve.com
Sergio Botero https://www.artstation.com/sboterod?fref=gc

Music:
Lombus, "Cosmic Soup" https://lombus.bandcamp.com
Aerium, "Waters of Atlantis" & "Fifth Star of Aldebaran" https://www.youtube.com/channel/UCRnUJY3l5vIJFGsY3XvW4dQ
Markus Junnikkala, "A Memory of Earth" https://www.markusjunnikkala.com/

Life On A Low Gravity Planet

In the future we might see the rise of minds entirely on computers, be it uploaded humans, transhumans, or artificial intelligence. But what would such an existence be like? Would they interact with our world or live in entirely virtual realities or simulated universes?

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Credits:
Life as a Digital Being
Episode 237; May 7, 2020

Writers:
Isaac Arthur

Editors:
Darius Said
Jerry Guern
Keith Blockus

Produced & Narrated by:
Isaac Arthur

Cover Art:
Jakub Grygier https://www.artstation.com/jakub_grygier

Graphics:
Jeremy Jozwik https://www.artstation.com/zeuxis_of_losdiajana

Music Courtesy of Epidemic Sound http://epidemicsound.com/creator

Life As A Digital Being

Antimatter represents both the most powerful weapon and most powerful fuel for a future humanity, if we can ever learn to make it efficiently and store it safely.

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Credits:
Antimatter Factories & Uses
Episode 239; May 21, 2020

Writers
Isaac Arthur
Steve Nixon

Editors
Darius Said
Jerry Guern
Keith Blockus

Produced & Narrated by
Isaac Arthur

Cover Art:
Jakub Grygier https://www.artstation.com/jakub_grygier

Graphics
Fishy Tree https://www.deviantart.com/fishytree/
Ken York (YD Visual) https://www.facebook.com/YDVisual/
Kris Holland (Mafic Studios) www.maficstudios.com
Sergio Botero https://www.artstation.com/sboterod?fref=gc

Music Courtesy of Epidemic Sound http://epidemicsound.com/creator