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PageSpeed Insights
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Report from Dec 28, 2025, 1:41:08ā€ÆPM
Showing results for URL:Ā https://wwwm.youtube.com/watch?v=mzQ21HZs7TU
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Core Web Vitals Assessment:Ā Failed
Largest Contentful Paint (LCP)
2.1 s
Page LoadsGood (ā‰¤ 2.5 s)81%Needs Improvement (2.5 s - 4 s)11%Poor (> 4 s)9%75th Percentile - 2.1 sCore Web Vital
Interaction to Next Paint (INP)
358 ms
Page LoadsGood (ā‰¤ 200 ms)56%Needs Improvement (200 ms - 500 ms)26%Poor (> 500 ms)18%75th Percentile - 358 msCore Web Vital
Cumulative Layout Shift (CLS)
0.09
Page LoadsGood (ā‰¤ 0.1)77%Needs Improvement (0.1 - 0.25)10%Poor (> 0.25)13%75th Percentile - 0.09Core Web Vital
Other Notable Metrics
First Contentful Paint (FCP)
2 s
Page LoadsGood (ā‰¤ 1.8 s)70%Needs Improvement (1.8 s - 3 s)17%Poor (> 3 s)13%75th Percentile - 2 sĀ 
Time to First Byte (TTFB)
1.1 s
Page LoadsGood (ā‰¤ 0.8 s)63%Needs Improvement (0.8 s - 1.8 s)25%Poor (> 1.8 s)12%75th Percentile - 1.1 sExperimental
Latest 28-day period
(history)Various mobile devicesMany samples (Chrome UX Report)Full visit durationsVarious network connectionsAll Chrome versions
Core Web Vitals Assessment:Ā Failed
Largest Contentful Paint (LCP)
4 s
Page LoadsGood (ā‰¤ 2.5 s)54%Needs Improvement (2.5 s - 4 s)20%Poor (> 4 s)25%75th Percentile - 4 sCore Web Vital
Interaction to Next Paint (INP)
315 ms
Page LoadsGood (ā‰¤ 200 ms)59%Needs Improvement (200 ms - 500 ms)27%Poor (> 500 ms)14%75th Percentile - 315 msCore Web Vital
Cumulative Layout Shift (CLS)
0.21
Page LoadsGood (ā‰¤ 0.1)65%Needs Improvement (0.1 - 0.25)11%Poor (> 0.25)23%75th Percentile - 0.21Core Web Vital
Other Notable Metrics
First Contentful Paint (FCP)
2.7 s
Page LoadsGood (ā‰¤ 1.8 s)54%Needs Improvement (1.8 s - 3 s)24%Poor (> 3 s)21%75th Percentile - 2.7 sĀ 
Time to First Byte (TTFB)
1 s
Page LoadsGood (ā‰¤ 0.8 s)67%Needs Improvement (0.8 s - 1.8 s)21%Poor (> 1.8 s)11%75th Percentile - 1 sExperimental
Latest 28-day period
(history)Various mobile devicesMany samples (Chrome UX Report)Full visit durationsVarious network connectionsAll Chrome versions
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Discover what your real users are experiencing
Core Web Vitals Assessment:Ā Failed
Largest Contentful Paint (LCP)
3.7 s
Page LoadsGood (ā‰¤ 2.5 s)54%Needs Improvement (2.5 s - 4 s)24%Poor (> 4 s)22%75th Percentile - 3.7 sCore Web Vital
Interaction to Next Paint (INP)
200 ms
Page LoadsGood (ā‰¤ 200 ms)75%Needs Improvement (200 ms - 500 ms)16%Poor (> 500 ms)9%75th Percentile - 200 msCore Web Vital
Cumulative Layout Shift (CLS)
0.18
Page LoadsGood (ā‰¤ 0.1)58%Needs Improvement (0.1 - 0.25)25%Poor (> 0.25)17%75th Percentile - 0.18Core Web Vital
Other Notable Metrics
First Contentful Paint (FCP)
1.6 s
Page LoadsGood (ā‰¤ 1.8 s)80%Needs Improvement (1.8 s - 3 s)12%Poor (> 3 s)8%75th Percentile - 1.6 sĀ 
Time to First Byte (TTFB)
0.3 s
Page LoadsGood (ā‰¤ 0.8 s)91%Needs Improvement (0.8 s - 1.8 s)5%Poor (> 1.8 s)4%75th Percentile - 0.3 sExperimental
Latest 28-day period
(history)Various desktop devicesMany samples (Chrome UX Report)Full visit durationsVarious network connectionsAll Chrome versions
Core Web Vitals Assessment:Ā Failed
Largest Contentful Paint (LCP)
4.7 s
Page LoadsGood (ā‰¤ 2.5 s)31%Needs Improvement (2.5 s - 4 s)36%Poor (> 4 s)32%75th Percentile - 4.7 sCore Web Vital
Interaction to Next Paint (INP)
237 ms
Page LoadsGood (ā‰¤ 200 ms)70%Needs Improvement (200 ms - 500 ms)19%Poor (> 500 ms)11%75th Percentile - 237 msCore Web Vital
Cumulative Layout Shift (CLS)
0.3
Page LoadsGood (ā‰¤ 0.1)49%Needs Improvement (0.1 - 0.25)21%Poor (> 0.25)29%75th Percentile - 0.3Core Web Vital
Other Notable Metrics
First Contentful Paint (FCP)
2.9 s
Page LoadsGood (ā‰¤ 1.8 s)37%Needs Improvement (1.8 s - 3 s)40%Poor (> 3 s)23%75th Percentile - 2.9 sĀ 
Time to First Byte (TTFB)
0.4 s
Page LoadsGood (ā‰¤ 0.8 s)86%Needs Improvement (0.8 s - 1.8 s)7%Poor (> 1.8 s)6%75th Percentile - 0.4 sExperimental
Latest 28-day period
(history)Various desktop devicesMany samples (Chrome UX Report)Full visit durationsVarious network connectionsAll Chrome versions
Diagnose performance issues