Concert.js

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Go beyond mere embedded video.

Animate your HTML. Lock it to your media. Move it, change it, show and hide user controls based on the current timeline position. Your whole page can carry forward the story, not just the video box in the middle.

Concert.js is a JavaScript component for easily defining sequences of changes to CSS styles, DOM objects, or anything else that can be manipulated with JavaScript, and playing these sequences or synchronizing them with media playback, user interaction, or your own components. Concert.js is freely available under the MIT License.