WDN Video Formats and Handbrake Presets
The WDN recommends encoding on-demand video with (free and open source) Handbrake. And WDN recommends doing it the really easy way, with the compression presets provided here.
UPDATE OCT. 30, 2013: The presets have been updated to version 3.
UNL's recommended Handbrake presets are available by download. Three presets are provided in a ZIP bundle; the number in each file title is the width of the file that the preset will produce, in pixels. WDN no longer provides a preset for 640-pixel video.
UNL_960 compresses video to 960px wide 1200kbps total including stereo audio
This is quarter-HD resolution and is the file you need for most web purposes; anything more would be overkill
UNL_1280 compresses video to 1280px wide 1800kbps total including stereo audio
This output might be more commonly referred to as 720p; it's a middle ground between qHD and full high-def
UNL_1920 compresses video to 1920px wide 3800kbps total including stereo audio
This is full high-def, deliverable over many faster DSL and cable connections. Impress your friends.
Captioning your video has long been required by accessibility laws and regulations. And, fortunately, the tools are getting better to get it accomplished. We've connected UNL MediaHub with Amara, a subtitle creation and hosting service. Hosting your video with UNL, on MediaHub, will ensure that your video content is available anywhere your website is.*
First, upload your video to MediaHub. Once you've got all your information added and submitted, go to the individual page for the video that you want to caption and copy the link location from the "Download this media file" link.
Next, go to  (formerly known as Universal Subtitles) and paste the link you've copied into the "Add a Video" box. From there, select your language and you'll be taken to a screen that will give you an instruction video on how to add captions to your video. It's a bit of a trick to add them at first, but once you get the hang of the keyboard shortcuts, it becomes much easier. From there, sync, save and edit as needed. UNL MediaHub is hooked up directly to Amara, so once you have a complete caption file saved, you'll see the option appear on your video in MediaHub when you click the [cc] button from the video playback bar.
* Several countries (China, Iran, and others) and K-12 schools in the U.S. have blocked YouTube videos. What that means is that a page with a YouTube video will load, but the video (presented in an iFrame and served from YouTube) doesn't.