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HeyGen API can edit and rebill only changed video scenes
HeyGen’s November API changelog adds an edit call for finished videos: customers can change script text, voice or avatar style while keeping the video ID. HeyGen says only changed scenes re-render and bill, which could lower the cost of small revisions. The item supplies no exact day, and editing has constraints such as completed-video status and a 10-scene limit for one request.
Primary source · HeyGen
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