It's not just a Game

The Smash Brothers
A 9 part series with each part focusing on a the SSBM legends and how a party game became a competitive game.
Full playlist:
https://www.youtube.com/watch?v=NSf2mgkRm7Q&list=PLoUHkRwnRH-IXbZfwlgiEN8eXmoj6DtKM&index=1

The Smash Brothers Part 1:

Road To Worlds
A 3 part series on the evolution of the League of Legends World Championships and some players personal journeys. (warning: feels)
Full playlist:
https://www.youtube.com/watch?v=q0wEW6NAPuE&list=PLPZ7h6L6LC7W4WlfJCFANQ2SYvxm2eEJO

Road To Worlds:

Free To Play:
A Documentary about a few players personal journeys in the first DOTA 2 The International (warning: feels)

Free To Play:

The King Of Kong : A Fistful Of Quarters
A look into how competitiveness of arcade games - with a focus on one mans attempt to break the 30 year old Donkey Kong world record.

The King of Kong:

Minecraft: The Story of Mojang
The rise of Minecraft and it's popularity.

Minecraft:

Looking For Group
The Rise of World of Warcraft and it's popularity and a retrospective look at its development over the years as well as its impact on players lives.

Looking For Group:

FRAG
The development of competitive gaming from arcafes and the history of pro-gaming (FPS) culminating in Fatal1ty hype.

FRAG:

Halo Retrospective
A look back at the Halo franchise and its impact on Console FPS from gameplay to multiplayer matchmaking. (production value isn't as high as the others but still pretty well made)

Halo Retrospective:

If you were to watch just one then The Smash Brothers; fascinating in its own right and well worth the watch. Feel free to add to this list.