--- title: LVSum: A Benchmark for Timestamp-Aware Long Video... description: LVSum is a new human-annotated benchmark for evaluating long-form video summarization with temporal alignment. It includes 72 diverse videos across 13 domains,... canonical: https://daily.dev/posts/lvsum-a-benchmark-for-timestamp-aware-long-video-summarization-1ytu24map twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: LVSum: A Benchmark for Timestamp-Aware Long Video Summarization | daily.dev og:description: LVSum is a new human-annotated benchmark for evaluating long-form video summarization with temporal alignment. It includes 72 diverse videos across 13 domains,... og:url: https://daily.dev/posts/lvsum-a-benchmark-for-timestamp-aware-long-video-summarization-1ytu24map og:image: https://api.daily.dev/og/posts/1yTU24map.png og:image:alt: LVSum: A Benchmark for Timestamp-Aware Long Video Summarization og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # LVSum: A Benchmark for Timestamp-Aware Long Video Summarization **[Apple Machine Learning Research](https://daily.dev/sources/mlapple)** · 1 min read · 0 upvotes · 0 comments ## Summary LVSum is a new human-annotated benchmark for evaluating long-form video summarization with temporal alignment. It includes 72 diverse videos across 13 domains, averaging 16 minutes each, annotated with up to 10 human-generated summaries containing temporal references. Evaluation of leading MLLMs reveals that transcripts contribute far more to summarization quality than visual frames alone, a significant gap remains between model and human summaries, and current models show systematic weaknesses in temporal grounding, instruction adherence, and cross-modal coherence. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Qwen3-VL can scan two-hour videos and pinpoint nearly every detail](https://daily.dev/posts/qwen3-vl-can-scan-two-hour-videos-and-pinpoint-nearly-every-detail-5dvyilfvf) · Hacker News · 1 upvotes · 0 comments - [The Essential Guide to Effectively Summarizing Massive Documents, Part 2](https://daily.dev/posts/the-essential-guide-to-effectively-summarizing-massive-documents-part-2-zvryq49fa) · Towards Data Science · 1 upvotes · 0 comments - [How Vimeo Implemented AI-Powered Subtitles](https://daily.dev/posts/how-vimeo-implemented-ai-powered-subtitles-pbl1y73mq) · ByteByteGo · 2 upvotes · 0 comments - [Teaching a Vision Model to See Like a Human Annotator—and Catching It When It Lies](https://daily.dev/posts/teaching-a-vision-model-to-see-like-a-human-annotator-and-catching-it-when-it-lies-unren10pj) · DevBlogs · 1 upvotes · 0 comments --- Tags: [#nlp](https://daily.dev/tags/nlp) [View this post on daily.dev](https://daily.dev/posts/lvsum-a-benchmark-for-timestamp-aware-long-video-summarization-1ytu24map) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"LVSum: A Benchmark for Timestamp-Aware Long Video Summarization","url":"https://daily.dev/posts/lvsum-a-benchmark-for-timestamp-aware-long-video-summarization-1ytu24map","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/lvsum-a-benchmark-for-timestamp-aware-long-video-summarization-1ytu24map"},"datePublished":"2026-08-02T07:03:17.456Z","dateModified":"2026-08-02T07:31:00.634Z","description":"LVSum is a new human-annotated benchmark for evaluating long-form video summarization with temporal alignment. 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