How does HTML video tag prevent users from downloading videos?
How to prevent downloading HTML5 videos from web pages?
Many websites want to protect their video content and prevent users from downloading at will. This article explores how a website prevents users from passing HTML5<video></video> Tag download videos, and the technical principles behind them.
Recently, when I tried to use the browser plug-in to download B station videos, I found that even if I got the MP4 video link, I could not download it directly. The browser prompted "The file cannot be extracted from the website", and only HTML files were saved. Further investigation found that the video link needs to contain the correct Referer information, otherwise the server will return a 403 error. This reveals how the website restricts video downloads.
<video></video> The tag itself does not have the function to prevent downloading. The mechanism for blocking downloads mainly depends on server-side configuration and front-end JavaScript code. Specific methods include:
Server-side Referer verification: The server will check the Referer field in the HTTP request header. If the Referer information does not meet expectations (for example, not from the website), the server will deny access, returning a 403 error. This is a common anti-theft chain mechanism.
Front-end JavaScript restrictions: Websites may use JavaScript code to disable the right-click menu, hide or modify the video URL, or dynamically generate video playback links to increase the difficulty of downloading.
Video encryption and dynamic loading: Some websites use video encryption technology, or through dynamic loading technology, making the real URL of the video difficult to obtain, thereby preventing direct downloading.
While these methods can effectively prevent most download behaviors, some professional video downloading tools or plug-ins may still bypass these limitations. The author tried to use parsing tools and found some high-definition video links, but due to the lack of appropriate tools, it was ultimately unable to download successfully.
In summary, preventing users from downloading videos is not<video></video> The function of the tag itself is the result of the joint action of server-side and front-end technologies. To download protected videos, you may need to use special tools or plug-ins.
The above is the detailed content of How does HTML video tag prevent users from downloading videos?. For more information, please follow other related articles on the PHP Chinese website!
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
AI Hentai Generator
Generate AI Hentai for free.
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
1384
52
How to solve the complexity of WordPress installation and update using Composer
Apr 17, 2025 pm 10:54 PM
When managing WordPress websites, you often encounter complex operations such as installation, update, and multi-site conversion. These operations are not only time-consuming, but also prone to errors, causing the website to be paralyzed. Combining the WP-CLI core command with Composer can greatly simplify these tasks, improve efficiency and reliability. This article will introduce how to use Composer to solve these problems and improve the convenience of WordPress management.
Accelerate PHP code inspection: Experience and practice using overtrue/phplint library
Apr 17, 2025 pm 11:06 PM
During the development process, we often need to perform syntax checks on PHP code to ensure the correctness and maintainability of the code. However, when the project is large, the single-threaded syntax checking process can become very slow. Recently, I encountered this problem in my project. After trying multiple methods, I finally found the library overtrue/phplint, which greatly improves the speed of code inspection through parallel processing.
How to solve complex BelongsToThrough relationship problem in Laravel? Use Composer!
Apr 17, 2025 pm 09:54 PM
In Laravel development, dealing with complex model relationships has always been a challenge, especially when it comes to multi-level BelongsToThrough relationships. Recently, I encountered this problem in a project dealing with a multi-level model relationship, where traditional HasManyThrough relationships fail to meet the needs, resulting in data queries becoming complex and inefficient. After some exploration, I found the library staudenmeir/belongs-to-through, which easily installed and solved my troubles through Composer.
How to solve SQL parsing problem? Use greenlion/php-sql-parser!
Apr 17, 2025 pm 09:15 PM
When developing a project that requires parsing SQL statements, I encountered a tricky problem: how to efficiently parse MySQL's SQL statements and extract the key information. After trying many methods, I found that the greenlion/php-sql-parser library can perfectly solve my needs.
How to optimize website performance: Experiences and lessons learned from using the Minify library
Apr 17, 2025 pm 11:18 PM
In the process of developing a website, improving page loading has always been one of my top priorities. Once, I tried using the Miniify library to compress and merge CSS and JavaScript files in order to improve the performance of the website. However, I encountered many problems and challenges during use, which eventually made me realize that Miniify may no longer be the best choice. Below I will share my experience and how to install and use Minify through Composer.
Use Composer to solve browser sniffing: The practical application of WhichBrowser/Parser library
Apr 17, 2025 pm 11:21 PM
I encountered a tricky problem when developing a multi-device-compatible website: how to accurately identify the user's browser and device information. After trying multiple methods, I found that directly parsing user-agent strings (User-Agent) are both complex and unreliable, and often misjudgments occur. Fortunately, I successfully solved this problem by installing the WhichBrowser/Parser library using Composer.
Solve CSS prefix problem using Composer: Practice of padaliyajay/php-autoprefixer library
Apr 17, 2025 pm 11:27 PM
I'm having a tricky problem when developing a front-end project: I need to manually add a browser prefix to the CSS properties to ensure compatibility. This is not only time consuming, but also error-prone. After some exploration, I discovered the padaliyajay/php-autoprefixer library, which easily solved my troubles with Composer.
How to ensure the quality of Magento2 code: Use magento/magento-coding-standard
Apr 17, 2025 pm 11:12 PM
When developing Magento2 extensions, I encountered a common problem: how to ensure that the code quality meets Magento's standards. This not only affects the maintainability of the code, but also affects the overall stability and performance of the project. After some exploration, I found the magento/magento-coding-standard library, which specifically provides PHPCodeSniffer rules for Magento2 projects to help developers quickly check and optimize code.
