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  1. TESIGN / RADAR
  2. 2026.10.02
  3. explainroo

explainroo

AI-made explainer videos, offline

WHO USES ITAnyone who wants explainer videos without a studio, especially coding-agent users.

Free, open-source explainer videos made by your AI coding agent, with voice, timing and rendering all on your computer.

CREATE
START IN 5 MINUTES ↓
Five explainroo looks: Paper (pour-over coffee), Clean (a sales pipeline), Chalk (a fridge), Blueprint (an API) and Midnight (a cache).
Five explainroo looks: Paper (pour-over coffee), Clean (a sales pipeline), Chalk (a fridge), Blueprint (an API) and Midnight (a cache).
Five explainroo looks: Paper (pour-over coffee), Clean (a sales pipeline), Chalk (a fridge), Blueprint (an API) and Midnight (a cache).

TESIGN TAKE

You can start by giving your agent the repository address and a topic.

Activity and discovery evidence
★ 19▲ +7 / 7d▲ 4 HNDaily star increases over 14 days. Hollow bars mean no data. The last day may be partial.2026-09-18 no data2026-09-19 no data2026-09-20 no data2026-09-21 no data2026-09-22 no data2026-09-23 no data2026-09-24 no data2026-09-25 no data2026-09-26 no data2026-09-27 no data2026-09-28 no data2026-09-29 no data2026-09-30 +22026-10-01 +5largest one-day increase in the 14 days+5last 14 days · stars per dayhollow = no data

19 stars · checked on GitHub GitHub check 35 h late · incl. +5 observed via GH Archive since then · 7-day +7 observed via GH Archive (as of ) · 4 Show HN points observed

NEW 1h OLD WHEN SEENCROSS-SIGNAL Show HN + GitHub

AT A GLANCE

LICENSE
MIT
USAGE
Use, change and redistribute, commercially too. Keep the notice.
LANGUAGE
JavaScript
PLATFORM
cli
ACTIVITY
last commit 1 day ago () · latest release [unconfirmed]
COMMUNITY
contributors [unconfirmed] · open issues [unconfirmed] · made by: [unconfirmed] Reference time unavailable
SOURCES
Show HN + GitHub
OPEN SOURCE
YES
FIRST SEEN
CATEGORY
MEDIA

A summary, not legal advice.

WHY IT MATTERS

Recording a voice, editing and wrangling video tools just for a short explainer is a lot. With explainroo you tell your agent the topic, it writes the script and drawings, and you get an MP4.

BUILD FROM THIS

  • The agent writes two files, script.md and scenes.js; the open Kokoro voice model reads the script, Whisper times each word, and the drawings appear on cue. No account or API key. Example looks include paper, chalk and blueprint.

WHO IT'S FOR

Anyone who wants explainer videos without a studio, especially coding-agent users.

START IN 5 MINUTES

# Paste the prompt from the README into your agent with your topic; it clones the repository and follows AGENTS.md.

CAVEATS

  • Needs a coding agent, and the README says it works best with Claude Code and Opus 5.5 for now. Recently released, with about 300 stars.

RECEIPT

FIRST SEEN
AT SOURCE
KEPT
STAR DELTA
+5 ★ / 24h
CREATED → FIRST SEEN
1h
WHEN FIRST SEEN
14 ★
SOURCES
Show HN + GitHub

The same facts in machine-readable form — View as Markdown · JSON

SIMILAR TOOLS

Up to five from MEDIA by ★ total: edited entries first, then repository cards; this entry is highlighted. Drawn from the same stored snapshot as the rankings — a comparison, not a recommendation.

IMAGENAME★ TOTAL▲ 7dLICENSEPLATFORMLAST PUSH
OpenMontage's Backlot board: a stage progress bar, an approved script page, a decision log and a four-scene storyboard.
OpenMontageVideo production via your coding agent★ 62.2k▲ +2AGPL-3.0copyleftmacos · linux · windows
VoiceStudio's Model Catalogue screen: a table of TTS engines with availability and CUDA, MPS and CPU compatibility.
VoiceStudioVoice cloning and dubbing on your PC★ 51.4k▲ +312AGPL-3.0copyleftmacos · windows · linux
Five explainroo looks: Paper (pour-over coffee), Clean (a sales pipeline), Chalk (a fridge), Blueprint (an API) and Midnight (a cache).
explainrooAI-made explainer videos, offlineTHIS ENTRY★ 19▲ +7MITpermissivecli
ffmpeg/ffmpegCARD★ 64.2k—Licence unconfirmedunconfirmed—
mifi/lossless-cutCARD★ 43.7k—GPL-2.0copyleft—

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TIMELINE

  1. Repository created
  2. Show HN post ↗
  3. FIRST SEEN BY TESIGN
  4. Published on TESIGN

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