Peter Yang demonstrates his free video-short skill in a 14-minute tutorial using Gemini in Antigravity. Google sponsors the video.

Start with an editable plan

  • Install the skill, point /video-short at a raw recording, and review its proposed scenes before rendering.
  • His example starts with a 54-second talking-head clip and adds captions, supporting footage, motion graphics and music.
  • The plan identifies full-screen speaker shots, tighter crops, split screens and full-screen supporting footage.
  • Review the footage sources and approve paid generation before the agent spends money.

Separate editing from generation

  • FFmpeg cuts and encodes video; yt-dlp retrieves supporting footage; HyperFrames handles transcription and graphics/rendering.
  • Optional Gemini API access adds generated images, video and music; it requires billing to be enabled.
  • Yang’s cleanup prompt shortens pauses to a second or less and removes false starts, repeated takes and filler words.
  • Preserve natural pacing: aggressive cleanup can turn an otherwise fluent recording into choppy jump cuts.

Put feedback on the actual frame

  • A browser review page lets the editor leave comments at the scene or frame that needs work.
  • Yang catches crops that cut off his head and requests simpler review controls.
  • The agent applies the notes, reopens the preview, and waits for approval before rendering the final clip.
  • Yang explicitly says earlier rounds of feedback were needed before the draft shown in the walkthrough.

Make quality checks part of the skill

  • The skill’s checklist asks whether the opening hook lands within three seconds and whether visuals add information beyond the narration.
  • Favor readable mobile layouts and strong real footage; avoid tiny interface panels that disappear on a phone.
  • Keep keys out of chat and source control; a local environment file still needs protection from agents and other processes.
  • Caveat: this is a sponsored, edited demonstration. Generation costs and third-party footage rights need separate checks for an actual project.

“It took a few more rounds of feedback to even get to the before version that you saw.” — Peter Yang, 10:34