Macsrule123 has a series of various Marathon movies on his page:

http://www.youtube.com/user/Macsrule123/videos?view=0

Chimera was a total conversion for the Myth II engine made by community members. It turned out so well, it got included in distributions of the Myth Codex.

GelospingmangoMan has Myth walkthroughs, with and without commentary, for the campaign scenarios of Myth 1, Myth 2, and Chimera.

Myth: The Fallen Lords w/o commentary
http://www.youtube.com/playlist?list=PLF5E232DFE2FEE606

Tanti1675 has produced a Let's Play video series for both Myth: The Fallen Lords and Myth 2: Soulblighter.

Check out his page for the rest of the videos.

http://www.youtube.com/user/Tanti1675/videos?view=0

DrTheoreticalDonuts on YouTube has done a Let's Play series on Bungie's first 3D first person shooter, Pathways Into Darkness. Find out how a simple human (?) can survive a fall from a crashing airplane, why there are dead German soldiers inside a lost pyramid in the Yucatan, and how to plan an alien musical instrument. Oh, yeah, and nuclear weapons, sleeping gods, and alien ambassadors. Marathon came before Halo, but before Marathon, came Pathways.

For the whole series, check out DrTheoreticalDonuts's playlist:

xxxkeyesxxx started a Marathon 2 walkthrough. Check out his list of videos for the other parts:

http://www.youtube.com/watch?v=Uz34Tdc3nuk&list=UUcj8y3o3ZYmri341dvUf_Xw...

YouTube user KnuckleTurtle also started a Marathon Let's Play; so far it has six parts (from Arrival to Couch Fishing).

Check out KnuckleTurtle's play list for the other videos in the series:

http://www.youtube.com/playlist?list=PLA810F88F20F4C412

Check out Stratafyre's playlist for the complete series.

http://www.youtube.com/watch?v=hsACbWHLJxE&list=PLavZ2dD1TvAGqZ31Eu1WuYv...

YouTube user timerider4 has posted a series of videos on Stubbs the Zombie. Since the partial Insane walkthrough we were hosting has gone missing, I've substituted these.

YouTube user timerider4 has posted a series of videos on Stubbs the Zombie. Since the partial Insane walkthrough we were hosting has gone missing, I've substituted these.

YouTube user timerider4 has posted a series of videos on Stubbs the Zombie. Since the partial Insane walkthrough we were hosting has gone missing, I've substituted these.

YouTube user timerider4 has posted a series of videos on Stubbs the Zombie. Since the partial Insane walkthrough we were hosting has gone missing, I've substituted these.

YouTube user timerider4 has posted a series of videos on Stubbs the Zombie. Since the partial Insane walkthrough we were hosting has gone missing, I've substituted these.

YouTube user timerider4 has posted a series of videos on Stubbs the Zombie. Since the partial Insane walkthrough we were hosting has gone missing, I've substituted these.

YouTube user timerider4 has a series of YouTube videos up on Stubbs the Zombie gameplay. Since the partial video walkthrough we were hosting before seems to have gone missing, I've substituted these videos.