"Lightroom 3 brought us the ability to add video to the Lightroom catalog and a crude way to preview them. Previews where made though Quick time, by popping the video up as a separate video file. Thankfully all that has changed. Lightroom 4 provides the ability to preview video
directly in the application. (You can also create stacks from your video files). Naturally H.264 Mov files such as those captured by Canon 5D Mk2, 7D etc are supported. A surprising move is the addition of AVCHD support (The standard format for many consumer and micro 4/3 cameras.). The move isn't surprising because of it's practical use, it's because AVCHD is a very complex CODEC and difficult to support. Kudos to Adobe for adding this functionality."
Another year, another LR beta. Some hots & nots: Lots of video functionality added, like cropping and effects, geo-tagging and soft-proofing, but face detection didn't make it. And its still bad at making cofeee:
"New tools to enhance and share your digital photograph library
A few new cameras are supported in this final version:
Canon" EOS-1D X, PowerShot G1 X, PowerShot S100
Fujifilm: FinePix F505 EXR, FinePix F605 EXR, FinePix HS30 EXR, FinePix HS33 EXR
Nikon: D4, D800, D800E
"What if I told you that by the end of this article I could drastically boost your Photoshop productivity? Interested? That's actually not an exaggeration if you've never taken advantage of Photoshop's actions and batch processing tools. If you find yourself repeatedly performing the same (often mindless) tasks in Photoshop one step at a time, I'm going to show you a better way to work.