swyx Open-Sources 90 Days of YouTube Thumbnail A/B Tests: 22 Wins Out of 41 Experiments
dkundel · x · 2026-08-19
swyx has long A/B tested thumbnails for the AI Engineer YouTube channel, and is now open-sourcing/crowdsourcing the learnings as a "Thumbnail Lab" site (hosted on ChatGPT Sites): 90 days, 54 discovered tests, 41 scraped reports—22 wins, 15 ties, 4 inconclusive. Each test shows watch-time share splits; e.g., a Dhruv Batra episode's winning thumbnail took 76.9% vs 23.1%, while an NVIDIA episode at 60.3% vs 39.7% was inconclusive. The goal is helping good educational content rise above the noise, with the community invited to share their own results.
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