Issues with Video Previews and HTML5 Features on My CapCut Resource Website

HTML-CSS
1

Hi everyone,

I’m working on a website dedicated to CapCut users, providing downloadable templates, tutorials, and video previews. While the site works well on most browsers, I’m encountering a few HTML-related issues that I can’t seem to resolve:

  1. Video Previews Not Playing: I’m using the <video> tag to display previews of CapCut templates. However, some browsers (especially Safari and Edge) fail to play the videos, showing a “format not supported” error. The videos are in .mp4 format with H.264 encoding, so I’m unsure why this is happening.
  2. Lazy Loading Problems: I’ve implemented the loading="lazy" attribute for images and videos to improve site performance, but it’s causing some videos not to load until the user scrolls back up. Is there a better way to handle lazy loading for video elements?
  3. Responsive Layout Issues: The video previews are wrapped in a responsive grid using CSS Grid, but sometimes they overlap on smaller screens, especially when users resize the browser. I’ve tried setting minmax() in the grid template, but the issue persists.
  4. Interactive Elements Not Firing Events: I’ve added custom buttons (e.g., “Download Template” or “Play Video”) using <button> elements with JavaScript event listeners. On some pages, the events don’t fire unless I reload the page. Could this be related to how I’m dynamically injecting HTML content?

Here’s an example of my video preview HTML:

<div class="template-preview">  
  <video controls width="300" preload="metadata">  
    <source src="path-to-video.mp4" type="video/mp4">  
    Your browser does not support the video tag.  
  </video>  
  <button class="download-btn">Download Template</button>  
</div>

Steps I’ve Tried:

  • Verified video encoding and tested multiple formats like .webm, but no luck.
  • Checked browser developer tools for errors (e.g., CORS or MIME type issues).
  • Used JavaScript to dynamically set the video poster attribute for lazy loading.
  • Ensured that grid layout properties include auto-fit and fr units.

Has anyone dealt with similar issues for a video-heavy HTML site? Any tips on improving browser compatibility, lazy loading, or responsive design for such a project?

Thanks in advance for your suggestions!

2

Can you provide a MRE for your issues? Otherwise people are only guessing

3

Thank you for your response! I understand the importance of providing a Minimal Reproducible Example (MRE). Here’s a simplified version of my setup that replicates the issues I’m facing:

1. Video Preview with <video> Tag

<div class="template-preview">  
  <video controls width="300" preload="metadata" loading="lazy">  
    <source src="path-to-video.mp4" type="video/mp4">  
    Your browser does not support the video tag.  
  </video>  
  <button class="download-btn">Download Template</button>  
</div>
  1. CSS for Responsive Grid
.template-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 16px;
}

.template-preview {
  border: 1px solid #ccc;
  padding: 8px;
}
  1. JavaScript for Event Listeners
document.addEventListener("DOMContentLoaded", () => {
  document.querySelectorAll(".download-btn").forEach((btn) => {
    btn.addEventListener("click", () => {
      alert("Template downloaded!");
    });
  });
});

Issues Reproduced:

  1. Video previews fail to play on some browsers (Safari/Edge) despite .mp4 with H.264 encoding.
  2. Lazy loading (loading="lazy") causes videos to load incorrectly when users scroll back up.
  3. Grid layout overlaps on smaller screens when the browser is resized.
  4. Event listeners for dynamically injected buttons don’t work unless the page is reloaded.

Let me know if you need further details or a more specific breakdown of any issue! I appreciate your time and expertise!

4

Is there anyone Please??

5

I can’t reproduce your issue with that code
Can you provide some code, maybe even a GitHub repo, with code to reproduce issue?

6

Thanks for your response! I appreciate you looking into this.

I understand that the provided code snippet might not be enough to reproduce the issue. The problems seem to be more noticeable in a real-world scenario where multiple video elements, lazy loading, and dynamic content are involved. I will create a GitHub repository and will share with you soon.

7

I am not able to see your code could you provide me your github link.

8

import { useState } from ‘react’;

function Counter() {
let [count, setCount] = useState(0);

const handleClick = () => {
count = count + 1;
console.log(‘Count:’, count);
};

return (


Current Count: {count}


Increment

);
}

export default Counter;

any new way to:

  • directly updating the count variable and using setCount?
  • modifing the handleClick function to properly update the state?
9

hi @katherwinston please create your own topic for your questions

1 Like
10

I’m currently working on my own video editing project related to CapCut, which is why I’ve been discussing related tools and techniques in this thread. Thankyou

11

great, please create your own topic for your questions anyway