Video Catcher - 抓取网页视频链接的 Chrome 插件

能做什么

自动找出媒体链接

mp4、webm、flv、mp3、m4a、m3u8 等，网页一播放就出现在列表里，工具栏图标上显示数量。

找得更全

不只看网络请求，还会检查网页接口返回的数据和页面里的播放器，很多藏起来的地址也能找到。

一键复制、下载

每条链接都能复制，直链直接下载；m3u8 会把分片拼成一个文件。

在线转 MP4

点「下载视频」会在 M3U8 在线播放器里打开，可以边看边存成 MP4。

安装（大约 1 分钟）

点上面的「下载插件」，得到 video-catcher-v0.2.1.zip，双击解压，会得到一个 video-catcher 文件夹。把它放到一个不会删除的地方，比如「文稿」里。
在 Chrome 地址栏输入 chrome://extensions 回车（Edge 是 edge://extensions）。
打开右上角的 「开发者模式」 开关（Edge 在左下角）。
点左上角的 「加载已解压的扩展程序」，选中刚才解压出来的 video-catcher 文件夹（选文件夹本身，里面有 manifest.json）。
点浏览器右上角的拼图图标 🧩，把 Video Catcher 固定到工具栏，用起来更方便。

这个插件没有上架应用商店，所以 Chrome 启动时可能会提示「停用开发者模式扩展程序」，点 × 关掉即可，不要点「停用」。解压出来的文件夹不能删除或移动，否则插件会失效。

怎么用

打开有视频的网页，先播放一下，再点工具栏上的 Video Catcher 图标，列表里每一行是一个找到的链接：

复制	把这个链接复制到剪贴板，可以粘贴到下载工具、VLC 等播放器里。
下载	用插件直接下载。m3u8 会把分片拼成一个 `.ts` 文件（多数播放器能直接放）。
下载视频	复制链接，并在新标签页打开 M3U8 在线播放器，在那里点「下载」可以存成 MP4，加密（AES-128）的流也能处理。

列表里不会显示 m3u8 视频的 .ts 小分片，要下载整段视频，用 m3u8 那一行就行。「清空」可以清掉当前网页的记录。

更新到新版本

在本页下载新的压缩包并解压；
用新文件覆盖原来的 video-catcher 文件夹（文件夹位置不变）；
打开 chrome://extensions，在 Video Catcher 卡片上点刷新按钮 ↻。

插件弹窗最下面显示当前版本号，和本页顶部的版本对比就知道是不是最新的。

限制和说明

不支持 YouTube（有专门的工具处理）。
只靠「录制画面」才能拿到的视频、部分直播，以及 DRM 加密的视频（例如正版视频平台）抓不到。
B 站等网站的画面和声音是分开的两个链接，需要分别下载。
隐私：插件不收集、不上传任何数据，找到的链接只保存在你的浏览器里。
请只下载你有权使用的内容，遵守网站的使用条款和版权规定。

What it does

Finds media links automatically

mp4, webm, flv, mp3, m4a, m3u8 and more show up in the list as soon as the page plays; the toolbar icon shows how many.

Looks deeper

Besides network requests it checks the data returned by the page's own API calls and the players on the page, so many hidden addresses turn up too.

Copy or download in one click

Every link can be copied; direct links download as they are, and m3u8 segments are joined into one file.

Convert to MP4 online

「下载视频」 (Download video) opens the link in the M3U8 Player, where you can watch it and save it as MP4.

Install (about a minute)

Click Download above to get video-catcher-v0.2.1.zip and unzip it. You get a video-catcher folder; keep it somewhere you won't delete, such as Documents.
Type chrome://extensions in Chrome's address bar and press Enter (Edge: edge://extensions).
Turn on Developer mode in the top-right corner (bottom-left in Edge).
Click Load unpacked in the top-left and pick the video-catcher folder you just unzipped (the folder itself, the one that contains manifest.json).
Click the puzzle icon 🧩 at the top right of the browser and pin Video Catcher to the toolbar.

The extension isn't in a web store, so Chrome may ask you to "disable developer mode extensions" at startup. Close that notice with ×; don't click "Disable". Don't delete or move the unzipped folder, or the extension stops working.

How to use

Open a page with a video, play it for a moment, then click the Video Catcher icon in the toolbar. Each row is a link it found. The buttons are labelled in Chinese:

复制 Copy	Copies the link to the clipboard, ready to paste into a download tool or a player such as VLC.
下载 Download	Downloads it with the extension. For m3u8 the segments are joined into one `.ts` file, which most players can open.
下载视频 Download video	Copies the link and opens the M3U8 Player in a new tab. Click 「下载」 there to save it as MP4; AES-128 encrypted streams work too.

The small .ts segments of an m3u8 video are hidden; to get the whole video, use the m3u8 row. 「清空」 (Clear) empties the list for the current page.

Updating

Download the new zip from this page and unzip it;
Replace the files in your existing video-catcher folder (keep the folder where it is);
Open chrome://extensions and click the reload button ↻ on the Video Catcher card.

The version is shown at the bottom of the extension's popup; compare it with the version at the top of this page.

Limits and notes

YouTube isn't supported (there are dedicated tools for it).
Videos that can only be captured by screen recording, some live streams, and DRM-protected video (paid streaming platforms) can't be caught.
Sites such as Bilibili serve picture and sound as two separate links; download both.
Privacy: the extension collects and uploads nothing; the links it finds stay in your browser.
Only download content you have the right to use, and respect each site's terms and copyright.