Community Video Kit

1. Ten rules

1. Truth. No invented statistics, testimonials or quotes. Every number or claim on screen has a source you can name.
2. Captions match the audio. Unsure what was said? Flag it and ask the speaker. Do not silently fix it.
3. Branding comes from official artwork, not from whatever shows up in the footage.
4. Mute test. With sound off, a first-time viewer gets the point and the one next action.
5. Frame 0 is finished. Call to action readable at phone size for at least 1.5 s. Keep captions and the call to action out of the bottom 20% and right 12%.
6. Audio. True peak at most -1 dBFS. About -14 LUFS for social and promo, about -16 LUFS for voice-led tutorials.
7. Options for real trade-offs. Link placement, cuts, format: show two or three versions before the final edit.
8. Keep voice, music and stems separable if you will finish in a DAW.
9. The builder is not the judge. A reviewer sees only the render, the brief and the previous report.
10. Log every round: render, findings, changes, measured values.

2. Measured checks

Run these on the exported file. They need ffmpeg 6+ and ffprobe. The zip adds a caption-pacing script and a ledger template.

Loudness and true peak

Read input_i (LUFS) and input_tp (dBFS). It only measures.

ffmpeg -hide_banner -i video.mp4 -af loudnorm=I=-14:TP=-1:LRA=11:print_format=json -f null - 2>&1 | tail -n 14

Motionless stretches

Lists every stretch of 0.6 s or more with almost no pixel change. In a promo, only the end card should appear. A freeze that runs to the end of the file shows a start with no end.

ffmpeg -hide_banner -i video.mp4 -vf "freezedetect=n=-50dB:d=0.6" -an -f null - 2>&1 | grep -E "freeze_(start|end|duration)"

Export spec

For a vertical social upload expect h264, 1080 x 1920, yuv420p.

ffprobe -v error -select_streams v:0 -show_entries stream=codec_name,width,height,pix_fmt,r_frame_rate,color_space -of default=nw=1 video.mp4

Pacing defaults

Promo: no motionless stretch over 0.6 s except the end card, hook readable in 1.5 s, captions at most 3 words per second. Tutorial: holds are fine until the narration naming a field ends, narration at most 2.5 words per second. These are our numbers; tune them.

3. Record without touching production

A virtual screen with a phone-sized Chromium window, captured and cropped by ffmpeg to clean 1080x1920. Playwright answers every /api/* call with a fake response and blocks everything off your own domain. Cookie consent is preset, tour pop-ups are hidden, and taps show a ripple. Use fictional data only, and keep a log of anything that reached the real site. The full code is in the zip. It ran on one Linux setup; we have not tested macOS or Windows.

4. Motion skills worth knowing

Three public repositories of instruction packs for AI coding assistants. We summarize them and link out; their text is not in the kit. Read each repository before installing. Our notes come from reading them on 2026-10-18, without running anything.

The three repositories are MIT licensed according to their READMEs; we did not re-check the LICENSE files. Confirm before you redistribute any of their files.

License

Free to download, use, share and adapt, including commercially. The text and rules are CC BY 4.0: credit "Community Video Kit by Free Music Tools (https://freemusictools.org), CC BY 4.0", link the license, and say if you changed it. (CC BY 4.0 license)

The code in the kit is MIT. The repositories in section 4 are not part of the kit and keep their own licenses. Provided as is, with no warranty. The full terms are in the README inside the zip.