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YouTube can automatically assign captions to video using speech recognition. Moreover, video publishers can now upload a transcript for their videos, which further helps the site add accurate captioning. You can translate these captions into multiple languages too when watching videos.

VodBurner Features * Create complete video productions directly from Skype calls. * Record both sides of any Skype video conversation, directly to your hard disk. * Captures at full frame rate and maximum resolution for the best quality possible. * Once the call is complete, generate a single complete video, incorporating both sides of the call, with just a couple of clicks. * Edit the video prior to publishing, using the built in Post-Production Console. * Alter which camera is used at any point (this side, other side or both sides). * Trim portions of the call so they do not appear in the final production. * Add text captions to the final production, with the ability to alter font, color and background. * Add pictures to the final production. * Add background audio to the final production, with professional fading options and volume control. * Generate ASF/WMV files suitable for uploading directly to YouTube and other services. * Upload directly to YouTube for public or private sharing. * Generate video with your choice of aspect ratio and resolution. * Anti-drift technology keeps both sides of the call in sync. * Ideal for podcast interview recording. * Ideal for recording shared desktop sessions.

Mathtrain.TV is a free educational "kids teaching kids" project from Mr. Marcos & his students at Lincoln Middle School in Santa Monica, CA. There are student-created, teacher-created, and captioned videos.

The National Archives Digital Vault poster and video creation tools allow students to drag and drop digital artifacts into a poster or video. The National Archives provides images, documents, and audio in an easy to use editor. When making a poster students can combine multiple images, change background colors, and create captions to make collages of digital artifacts. See the screen capture below for a demonstration of poster editing.

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Be careful...many of these captions are inappropriate!

a free photo service that lets you easily upload and add speech bubbles to your photos and share them with friends via email or on Facebook®, MySpace®, Orkut, blogs, and message boards.