This guy CHKilroy makes videos with his clan ShackTac in ArmA 2. You can literally spend hours just watching his stuff. They're really hardcore, and you can hear the com chatter and hear they coordinate a lot, and it can be pretty funny some times.
[youtube=425,350]K8maP09q6g8[/youtube]
[youtube=425,350]vaelJPZD-F4[/youtube]