Use when auditing slow page loads, heavy assets, or rendering delays related to Convert animated GIFs to video. Verify the actual bottleneck in DevTools, Lighthouse, or field data before recommending changes.
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tessl review fix ./skills/animated-content/SKILL.mdLarge animated GIFs can significantly increase page weight and consume excessive CPU/memory, leading to slower page loads and poor scrolling performance.
<video> instead of large GIFs for animationsCheck for large animated GIFs that could be replaced with more efficient video formats like MP4 or WebM.
Convert animated GIFs to MP4 or WebM and use the <video> tag with autoplay, loop, muted, and playsinline attributes.
Explain why video formats are more efficient than GIFs for animated content and how they improve performance.
Review the routes, assets, and loading behavior that affect Convert animated GIFs to video. Flag exact files, requests, or rendering steps that add unnecessary network, CPU, or layout cost, and describe the measurement method used to confirm the issue.
For full implementation details, code examples, and framework-specific guidance,
see references/rule.md.
Rule page: https://frontendchecklist.io/en/rules/performance/animated-content
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