Zachariah Scott created this wonderful machinima video, "The Turret Anthem," capturing a marvellous musical performance by the Portal Turrets in Glados's chamber:

This video was shot on black void, using a rebuild version of glados' chamber that I put together by hand. Fun story about this video, I've been trying to make it for about 6 months, it's a super late Turret Week video. I kept overthinking it, and had much of the principal synchronization done but couldnt' figure out how I wanted to shoot it, well I sat down this weekend and knocked it out in two days, and I'm pretty sure nobody will have any problem with the results. The name of this video is The Turret Anthem, but throughout production I always referred to it by it's secret codename, Megadub, and so it sticks.

The Turret Anthem

Ronaldthecock produced this Black Mesa/Michigan J Frog mashup as part of a machinima challenge on steamcommunity.com:

Let's have another Theme week. Starting sunday September 16th and running through sunday September 23rd, will be Critter week. in honor of the release of Black Mesa this friday, Make Videos of headcrabs, bullsquids, antlions, alien swarm monsters, or whatever creepy crawly you want. Put "OSFM critter week" in the Video description and post it here. There are a couple people working on rigs to make animating monsters like headcrabs easier, so keep an eye out and I'll post them here.

CRITTER WEEK! :: Open Source Filmmaker: (via JWZ)