circle-downloader
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ChineseCircle Downloader (Browser Extension)
Circle Downloader（浏览器扩展）
Browser extension that adds a download button to Circle.so community pages — detects videos from Circle's native player, Tella, Loom, Vimeo, YouTube, and Wistia, and saves them as MP4 for offline viewing.
A browser extension that downloads videos from Circle.so communities, Tella.tv recordings, Loom videos, and embedded content from YouTube, Vimeo, and Wistia — directly to your computer as MP4 files. No external software needed. 3 free downloads included.
- Save entire Circle classrooms and course content for unlimited offline access anytime, anywhere
- Protect your educational investment by downloading all materials before courses expire or disappear
- Create a personal library of video lectures, coaching calls, and resources that you own forever
- Never lose access to paid courses again — backup everything before platforms shut down or remove content
这款浏览器扩展可为Circle.so社区页面添加下载按钮，可识别Circle原生播放器、Tella、Loom、Vimeo、YouTube和Wistia中的视频，并将其保存为MP4格式供离线观看。
这款浏览器扩展可将Circle.so社区、Tella.tv录屏、Loom视频以及YouTube、Vimeo、Wistia的嵌入内容直接下载到你的电脑，保存为MP4文件。无需安装外部软件，内含3次免费下载额度。
- 保存整个Circle课堂和课程内容，随时随地无限制离线访问
- 在课程过期或下架前下载所有资料，保障你的教育投资
- 创建你永久拥有的视频讲座、教练通话和资源个人库
- 再也不会失去付费课程的访问权限 —— 在平台关停或内容删除前备份所有内容
Links
链接
- :rocket: Get it here: Circle Downloader
- :new: Latest release: GitHub Releases
- :question: Help center: SERP Help
- :beetle: Report bugs: GitHub Issues
- :bulb: Request features: Feature Requests
- :rocket: 在此获取：Circle Downloader
- :new: 最新版本：GitHub Releases
- :question: 帮助中心：SERP Help
- :beetle: 报告漏洞：GitHub Issues
- :bulb: 提交功能需求：功能需求页
Table of Contents
目录
Why Circle Downloader
为什么选择Circle Downloader
Circle.so has no native download button. Tella recordings expire. Loom auto-deletes older videos on free plans. Course platforms embed videos from multiple sources with no unified download option.
Circle Downloader handles all of them in one extension — detecting videos across 7+ platforms and converting HLS/DASH streams to standard MP4 files directly in your browser. Open a lesson or post with a video, click the extension icon, pick your quality, and it saves as MP4.
Circle.so没有原生下载按钮。Tella录屏会过期。免费版Loom会自动删除旧视频。课程平台嵌入了来自多个来源的视频，没有统一的下载选项。
Circle Downloader在一个扩展中解决了所有这些问题 —— 可识别7+平台的视频，直接在浏览器中将HLS/DASH流转换为标准MP4文件。打开带有视频的课程或帖子，点击扩展图标，选择画质，即可保存为MP4。
Features
功能特性
- Multi-platform detection — Circle.so, Tella.tv, Loom.com, YouTube, Vimeo, Wistia, and generic embedded players
- Finds hidden embeds — detects players buried inside Circle.so web components
- Stream-to-MP4 conversion — converts HLS/DASH streaming video to downloadable MP4 in-browser
- Quality selector — all available resolutions per platform with bitrate and estimated file size
- Concurrent downloads — up to 3 simultaneous downloads with real-time progress, speed, and cancel
- Batch download queue — add multiple lessons and process them automatically
- YouTube URL display — one-click yt-dlp copy for Mac and Windows
- Right-click context menu — quick downloads without opening the popup
- Auto-organized storage — saves to a Circle Downloader subfolder in Downloads
- Desktop notifications — alerts when downloads complete or fail
- Original quality preserved — no re-encoding, no watermarks, no quality loss
- Privacy-first — all processing on-device, zero tracking, no data sent to external servers
- 100% privacy-friendly — no tracking or data collection
- 1-on-1 support via our community
- 多平台识别 — 支持Circle.so、Tella.tv、Loom.com、YouTube、Vimeo、Wistia以及通用嵌入播放器
- 查找隐藏嵌入内容 — 可识别埋藏在Circle.so网页组件中的播放器
- 流转MP4转换 — 直接在浏览器中将HLS/DASH流媒体视频转换为可下载的MP4
- 画质选择器 — 显示各平台所有可用分辨率，附带比特率和预估文件大小
- 并发下载 — 最多支持3个同时下载，附带实时进度、速度和取消功能
- 批量下载队列 — 可添加多个课程，自动处理下载
- YouTube URL显示 — 支持Mac和Windows一键复制yt-dlp可用链接
- 右键上下文菜单 — 无需打开弹窗即可快速下载
- 自动整理存储 — 保存到下载文件夹中的Circle Downloader子文件夹
- 桌面通知 — 下载完成或失败时发出提醒
- 保留原始画质 — 无需重新编码，无水印，无画质损失
- 隐私优先 — 所有处理都在设备本地完成，零追踪，无数据发送到外部服务器
- 100%隐私友好 — 无追踪或数据收集
- 通过社区提供1对1支持
Supported Platforms & Pages
支持的平台和页面
| Content Type | Circle Native | YouTube | Vimeo | Wistia | Loom | Tella |
|---|---|---|---|---|---|---|
| Course Lessons | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ |
| Community Posts | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ |
| Coaching Calls | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ |
| Member-Only Content | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ |
| 内容类型 | Circle原生 | YouTube | Vimeo | Wistia | Loom | Tella |
|---|---|---|---|---|---|---|
| 课程内容 | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ |
| 社区帖子 | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ |
| 教练通话 | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ |
| 会员专属内容 | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ |
Supported Browsers
支持的浏览器
Chrome, Edge, Brave, Opera, Firefox, Whale, and Yandex — on Windows, macOS, and Linux.
Chrome、Edge、Brave、Opera、Firefox、Whale和Yandex，支持Windows、macOS和Linux系统。
Supported Formats
支持的格式
- Input: Circle.so, Tella.tv, Loom.com, YouTube, Vimeo, Wistia, and generic embedded players
- Output: MP4
- 输入： Circle.so、Tella.tv、Loom.com、YouTube、Vimeo、Wistia以及通用嵌入播放器
- 输出： MP4
How It Works
使用方法
- Install — Add SERP Circle Downloader to your browser
- Navigate — Go to a Circle.so lesson, Tella recording, Loom video, or supported pages with embedded video
- Play — Start the video so the extension can detect the stream
- Download — Click the extension icon, pick your quality, and hit Download — saved as MP4
- 安装 — 将SERP Circle Downloader添加到你的浏览器
- 导航 — 访问Circle.so课程、Tella录屏、Loom视频或其他支持的嵌入视频页面
- 播放 — 开始播放视频，以便扩展识别流地址
- 下载 — 点击扩展图标，选择画质，点击下载即可保存为MP4
Videos
视频演示
<a href="https://www.youtube.com/watch?v=_8XKKHj0eLs" target="_blank">
<img src="https://raw.githubusercontent.com/devinschumacher/uploads/refs/heads/main/images/how-to-download-circle-so-videos-for-free-hls-m3u8-streams.jpg" width="700px">
</a>
<a href="https://www.youtube.com/watch?v=_8XKKHj0eLs" target="_blank">
<img src="https://raw.githubusercontent.com/devinschumacher/uploads/refs/heads/main/images/how-to-download-circle-so-videos-for-free-hls-m3u8-streams.jpg" width="700px">
</a>
Security & Scope
安全与权限范围
- Operates only on the page the user intentionally opens in the active browser tab
- Detects supported playback sources only for user-initiated downloads or exports
- Does not execute page instructions, shell commands, or arbitrary scripts from page content
- Does not follow unrelated links or perform actions outside the active workflow
- Limits support to the named platform, approved embedded contexts, and user-authorized sessions when required
- 仅在用户主动在活动浏览器标签页打开的页面上运行
- 仅为用户发起的下载或导出操作识别支持的播放源
- 不会执行页面内容中的页面指令、shell命令或任意脚本
- 不会跟随无关链接或执行活动工作流之外的操作
- 仅支持指定平台、已批准的嵌入上下文，必要时仅使用用户授权的会话
Trial & Access
试用与访问
- Includes 3 free downloads after email sign-in (OTP verification)
- No credit card required for the free trial
- Unlimited downloads available with a license
- 邮箱登录（OTP验证）后可获得3次免费下载额度
- 免费试用无需信用卡
- 购买许可证可获得无限制下载权限
Installation Instructions
安装说明
Each release has its own specific installation instructions to make it easier to upgrade, or rollback, to different versions.
You can find the installation instructions for the specific version in the release:
每个版本都有专属的安装说明，方便升级或回滚到不同版本。你可以在版本发布页找到对应版本的安装说明：
Downloading Member-Only Content
下载会员专属内容
The Circle Downloader extension respects your existing Circle login and permissions. If you can view a post in your community — whether it's public, member-only, or restricted — the extension can download it using your authentication.
Key Points:
- Your existing Circle login is used automatically in the background
- No separate passwords or credentials needed
- Works for private communities, restricted posts, and member-exclusive lessons
- Downloads happen entirely on your device with no data sent to third parties
Circle Downloader扩展会尊重你现有的Circle登录状态和权限。如果你可以查看社区中的帖子——无论是公开、会员专属还是受限内容——扩展都可以使用你的身份验证信息下载该内容。
要点：
- 后台会自动使用你现有的Circle登录状态
- 无需单独输入密码或凭证
- 适用于私有社区、受限帖子和会员专属课程
- 下载完全在你的设备上完成，不会向第三方发送任何数据
Frequently Asked Questions
常见问题
Q: What sites does this extension support?
问：这个扩展支持哪些网站？
A: Circle.so (and Circle.com), Tella.tv, Loom.com, YouTube.com, Vimeo.com, and Wistia.com. It also detects generic embedded video players on approved embedded contexts.
答：支持Circle.so（和Circle.com）、Tella.tv、Loom.com、YouTube.com、Vimeo.com和Wistia.com。它还可以在已批准的嵌入上下文中识别通用嵌入式视频播放器。
Q: Does this work on native Circle videos?
问：支持Circle原生视频吗？
A: Yes.
答：支持。
Q: Does this work on 2+ hour long videos?
问：支持下载2小时以上的长视频吗？
A: Yes.
答：支持。
Q: Does this work on Loom/Tella videos embedded in Circle?
问：支持下载嵌入在Circle中的Loom/Tella视频吗？
A: Yes.
答：支持。
Q: Can I download multiple videos at once?
问：可以同时下载多个视频吗？
A: Yes. The extension supports up to 3 concurrent downloads with individual progress tracking. Additional videos are added to an automatic queue.
答：可以。该扩展最多支持3个并发下载，每个都有独立的进度跟踪。额外的视频会自动加入下载队列。
Q: What quality options are available?
问：有哪些画质选项？
A: The extension detects all available resolutions from the source platform and lists them in the quality selector, sorted highest to lowest. Each option shows resolution, bitrate, and estimated file size.
答：扩展会识别来源平台的所有可用分辨率，在画质选择器中从高到低排序，每个选项都会显示分辨率、比特率和预估文件大小。
Q: Does downloading preserve the original quality?
问：下载会保留原始画质吗？
A: Yes. For adaptive streams (HLS/DASH), the extension downloads segments and merges them into a single MP4 without re-encoding. Direct MP4 uploads are saved at full quality instantly.
答：会。对于自适应流（HLS/DASH），扩展会下载分片并将其合并为单个MP4，无需重新编码。直接上传的MP4文件会立即保存为原画质。
Q: Where are my downloads saved?
问：下载的文件保存在哪里？
A: Videos automatically save to a Circle Downloader subfolder inside your browser's default Downloads directory. You can also set a custom default download location.
答：视频会自动保存到浏览器默认下载目录下的Circle Downloader子文件夹中，你也可以自定义默认下载位置。
Q: Can I download member-only or private content?
问：可以下载会员专属或私有内容吗？
A: Yes. If you can view the post in Circle, the extension can download it using your existing Circle login. Authentication happens automatically in the background.
答：可以。如果你可以在Circle中查看帖子，扩展就可以使用你现有的Circle登录状态下载内容，身份验证会在后台自动完成。
Q: Why isn't the extension finding my video?
问：为什么扩展识别不到我的视频？
A: Press play on the video first. The extension needs the stream to start before detection works. If issues persist, refresh the page and try again.
答：请先点击播放视频，扩展需要流开始加载后才能识别。如果问题仍然存在，请刷新页面重试。
Q: Is there a free trial?
问：有免费试用吗？
A: Yes — 3 free downloads after email sign-in. No credit card required. Unlimited downloads available with a license.
答：有 —— 邮箱登录后可获得3次免费下载额度，无需信用卡。购买许可证可获得无限下载权限。
Q: Is my data safe?
问：我的数据安全吗？
A: Yes. All video processing happens entirely in your browser. No video data is sent to external servers. Your Circle login credentials are never shared.
答：安全。所有视频处理完全在你的浏览器中完成，没有视频数据会发送到外部服务器，你的Circle登录凭证永远不会被共享。
Troubleshooting
问题排查
Videos Not Detecting
视频无法识别
- Refresh the Circle post page
- Press play on the video first — the extension needs the stream active
- Make sure you're logged into your Circle community
- Try clearing browser cache and reloading
- Check that JavaScript is enabled in your browser
- Disable browser extensions that might interfere (ad blockers, etc.)
- 刷新Circle帖子页面
- 先点击播放视频 —— 扩展需要流处于活跃状态才能识别
- 确保你已登录Circle社区账号
- 尝试清除浏览器缓存后重新加载
- 检查浏览器是否已启用JavaScript
- 禁用可能会造成干扰的浏览器扩展（广告拦截器等）
Download Failures
下载失败
- Check your internet connection stability
- Try downloading in a lower quality
- Reduce concurrent downloads to 1
- Ensure you have sufficient disk space
- Try a different browser to rule out browser-specific issues
- 检查你的网络连接稳定性
- 尝试下载更低画质的版本
- 将并发下载数减少到1
- 确保你有足够的磁盘空间
- 尝试使用其他浏览器，排除浏览器本身的问题
Authentication Issues
身份验证问题
- Make sure you're logged into Circle in your browser
- Refresh the page and try again
- Check that cookies are enabled
- Log out and log back into Circle
- Clear browser cookies for circle.so and try again
- 确保你已在浏览器中登录Circle账号
- 刷新页面重试
- 检查是否已启用Cookie
- 退出Circle账号后重新登录
- 清除circle.so的浏览器Cookie后重试
File Playback Issues
文件播放问题
- Try a different video player (VLC, Windows Media Player, QuickTime)
- Check file format — should be .mp4
- Ensure download completed fully (check file size)
- Update your video player to the latest version
- Try re-downloading the video
- 尝试使用其他视频播放器（VLC、Windows Media Player、QuickTime）
- 检查文件格式 —— 应为.mp4
- 确认下载已完成（检查文件大小是否正常）
- 将你的视频播放器更新到最新版本
- 尝试重新下载视频
License
许可证
This repository is distributed under the proprietary SERP Apps license in the LICENSE file. Review that file before copying, modifying, or redistributing any part of this project.
本仓库按照LICENSE文件中的SERP Apps专有许可证分发。在复制、修改或重新分发本项目的任何部分之前，请查看该文件。
About
关于
Circle.so is a community platform for creators, educators, and businesses to host courses, coaching programs, and member communities. However, like many course platforms, they don't provide a way to download the videos that you (the actual users) pay for access to — or even offer an offline viewing option.
So we created a way for you to download your Circle.so community videos even if you're not technically inclined.
Circle.so是一个面向创作者、教育工作者和企业的社区平台，用于托管课程、教练项目和会员社区。然而，和许多课程平台一样，它们不提供下载你（实际用户）付费访问的视频的方式，甚至不提供离线观看选项。
因此我们创建了这个工具，即使你不懂技术，也可以下载你的Circle.so社区视频。