Access videos.univ-nantes.fr. WebTV de Nantes Université

name

value

score

weighting

FCP (First Contentful Paint)

Value6.2 s

3/100

10%

LCP (Largest Contentful Paint)

Value8.3 s

2/100

25%

SI (Speed Index)

Value10.0 s

9/100

10%

TBT (Total Blocking Time)

Value2,340 ms

5/100

30%

CLS (Cumulative Layout Shift)

Value0.287

42/100

15%

TTI (Time to Interactive)

Value8.9 s

35/100

10%

portail

201 ms

webtv.univ-nantes.fr

462 ms

styles.css

205 ms

jquery.bxslider.css

203 ms

jquery.min.js

307 ms

Our browser made a total of 73 requests to load all elements on the main page. We found that 42% of them (31 requests) were addressed to the original Videos.univ-nantes.fr, 45% (33 requests) were made to Webtv.univ-nantes.fr and 5% (4 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (1.5 sec) belongs to the original domain Videos.univ-nantes.fr.

Content Size

1.2 MB

After Optimization

643.5 kB

In fact, the total size of Videos.univ-nantes.fr main page is 1.2 MB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 40% of websites need less resources to load. Javascripts take 679.0 kB which makes up the majority of the site volume.

HTML Optimization

-76%

Potential reduce by 56.2 kB

Original 74.0 kB
After minification 67.3 kB
After compression 17.8 kB

HTML content can be minified and compressed by a website’s server. The most efficient way is to compress content using GZIP which reduces data amount travelling through the network between server and browser. HTML code on this page is well minified. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 56.2 kB or 76% of the original size.

Image Optimization

-9%

Potential reduce by 34.5 kB

Original 405.6 kB
After minification 371.1 kB

Image size optimization can help to speed up a website loading time. The chart above shows the difference between the size before and after optimization. Vi De Os Univ Nantes images are well optimized though.

JavaScript Optimization

-63%

Potential reduce by 428.2 kB

Original 679.0 kB
After minification 657.2 kB
After compression 250.8 kB

It’s better to minify JavaScript in order to improve website performance. The diagram shows the current total size of all JavaScript files against the prospective JavaScript size after its minification and compression. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 428.2 kB or 63% of the original size.

CSS Optimization

-82%

Potential reduce by 16.8 kB

Original 20.6 kB
After minification 15.8 kB
After compression 3.8 kB

CSS files minification is very important to reduce a web page rendering time. The faster CSS files can load, the earlier a page can be rendered. Videos.univ-nantes.fr needs all CSS files to be minified and compressed as it can save up to 16.8 kB or 82% of the original size.

Requests Now

After Optimization

The browser has sent 70 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Vi De Os Univ Nantes. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 10 to 1 for JavaScripts and as a result speed up the page load time.

Accessibility Issues

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

High

[aria-*] attributes do not match their roles

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

Areas of Improvement

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

High

Displays images with incorrect aspect ratio

High

Serves images with low resolution

Low

Detected JavaScript libraries

Search Engine Optimization Advices

Format your HTML in a way that enables crawlers to better understand your app’s content.

High

Links do not have descriptive text

High

Image elements do not have [alt] attributes

To appear in search results, crawlers need access to your app.

High

robots.txt is not valid

Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. [Learn more](https://developers.google.com/search/mobile-sites/).

High

Document uses legible font sizes

High

Tap targets are not sized appropriately

Language and Encoding

Language Detected

FR
Language Claimed

N/A
Encoding

UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Videos.univ-nantes.fr can be misinterpreted by Google and other search engines. Our service has detected that French is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that Videos.univ-nantes.fr main page’s claimed encoding is utf-8. Use of this encoding format is the best practice as the main page visitors from all over the world won’t have any issues with symbol transcription.

Social Sharing Optimization

videos.univ-nantes.fr

Open Graph description is not detected on the main page of Vi De Os Univ Nantes. Lack of Open Graph description can be counter-productive for their social media presence, as such a description allows converting a website homepage (or other pages) into good-looking, rich and well-structured posts, when it is being shared on Facebook and other social media. For example, adding the following code snippet into HTML <head> tag will help to represent this web page correctly in social networks:

Report Summary

Performance

Accessibility

Best Practices

SEO

WebTV de Nantes Université - Webtv de Nantes Université

Page Load Speed

First Response

Resources Loaded

Page Rendered

About Website

Key Findings

Performance Metrics

Measured Metrics

FCP (First Contentful Paint)

LCP (Largest Contentful Paint)

SI (Speed Index)

TBT (Total Blocking Time)

CLS (Cumulative Layout Shift)

TTI (Time to Interactive)

Network Requests Diagram

portail

webtv.univ-nantes.fr

styles.css

jquery.bxslider.css

jquery.min.js

Page Optimization Overview & Recommendations

Content Size

After Optimization

HTML Optimization

Image Optimization

JavaScript Optimization

CSS Optimization

Requests Breakdown

Requests Now

After Optimization

Network Requests Diagram

portail

webtv.univ-nantes.fr

styles.css

jquery.bxslider.css

jquery.min.js

jquery.bxslider.js

style.css

jquery.dropdownPlain.js

addthis_widget.js

index.php

header_webtv.jpg

bkg-menu.png

bkg-menu-li-on.png

picto-home-on.png

input-recherche.png

searchButton.gif

bkg-emission.png

bkg-titre.png

btn-en-savoir-plus.png

picto-tag-blanc.png

voir-la-video.png

picto-facebook.png

picto-twitter.png

picto-instagram.png

picto-linkedin.png

picto-youtube.png

picto-rss.png

imgm7825.jpg

imgm7682.jpg

imgm7786.jpg

imgm7710.jpg

imgm7732.jpg

imgm7489.jpg

imgm6232.jpg

imgm2043.jpg

imgm1917.jpg

imgm1152.jpg

06-trouver_sa_formation.jpg

imgm3619.jpg

imgm1256.jpg

01-presentation_univ.jpg

07-la_recherche.jpg

imgm3532.jpg