What measured studies say about titles and thumbnails: rewriting titles for each community lifts engagement; outrage framing lifts engagement too - at a social cost

Two studies (abstract level). (1) Hu et al.: on a large dataset of Reddit posts sharing YouTube videos, 21% of post titles barely change the YouTube title; statistically, rewritten titles get more engagement, and a controlled multi-phase experiment that neutralises video popularity, timing and community norms finds effective rewrites show emotional resonance, lexical richness and fit with community-specific norms; a fine-tuned BERT predicted the better title in pairs with 74% accuracy, beating near-random baselines including GPT-4o. Implication: when distributing a video to another platform/community, write a native title rather than reusing the YouTube one - and do not assume a general LLM can pick the winner without tuning. (2) Park et al.: a fine-tuned vision-language classifier of moral-emotional framing in thumbnails+titles across ~400,000 news-channel YouTube videos (Korea and US) finds "other-condemning" moral outrage consistently increases views, likes AND comments across both cultures; the authors warn this can deepen polarisation and release their classifiers. Implication for creators: outrage reliably buys engagement in news contexts, but it conflicts with honest packaging guidance (misleading thumbnails are common and detectable, C3-B425-02) and with community trust; prefer emotional resonance that does not misrepresent content. Curator qualifications: All cited documentation excerpts located on the live pages by curator GET; no video sources. Abstract-level reading of the paper(s); full methods not read by discovery or the curator. Limitations: Abstract-level; R2 limited to mainstream news channels; R1 to Reddit sharing of YouTube links. Evidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.

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  "citations": [
    {
      "url": "https://arxiv.org/abs/2505.03769v1",
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      "url": "https://arxiv.org/abs/2601.21815v2",
      "note": "abstract; abstract"
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