ᕙ(⇀‸↼‶)ᕗ The clean way is Telegram Desktop → Export Chat History. You do not need to download the 419 videos one by one.
This works for a group you already belong to, as long as the course owner has not enabled content-protection settings that prevent saving or forwarding. Do not try to bypass those restrictions; ask the seller for an official download option instead.
01 · Use Telegram Desktop
Install the official Telegram Desktop app on Windows, macOS, or Linux and sign in to the same account that is a member of the course group.
On Windows or Linux:
- Open the Java DSA group.
- Click the three-dot menu in the top-right.
- Select Export chat history.
- In the export window, enable Videos.
- Disable photos, stickers, voice messages, and other media if you only want lectures.
- Set the maximum file size to the highest available value.
- Set the date range from the earliest course message to today.
- Choose a download folder with plenty of free space.
- Click Export.
Telegram’s export tool can batch-export media from a chat and lets you filter by media type, maximum file size, and date range. telegram.org1
02 · macOS note
If the export option is missing on Mac, use the Telegram Desktop version downloaded from the official desktop site rather than the Mac App Store version. The export feature may not be available in the App Store build. witness.org
03 · What the downloaded folder looks like
Telegram normally creates a folder similar to:
text
Telegram Desktop Export/├── ChatExport_1/│ ├── videos/│ │ ├── video_001.mp4│ │ ├── video_002.mp4│ │ └── ...│ ├── messages.html│ └── result.json
The videos may not initially be named according to the lecture titles. Keep messages.html or result.json; those files preserve the connection between the video filename and the original Telegram message. witness.org
04 · Check storage before starting
| Average video size | 419 videos require approximately |
|---|---|
| 200 MB | 84 GB |
| 500 MB | 210 GB |
| 1 GB | 419 GB |
| 2 GB | 838 GB |
Keep an additional 15–20% free space for temporary files. If the lessons are high quality, a 1 TB external SSD is the safer choice.
05 · Keep the export from stopping
- Use a computer rather than a phone.
- Keep Telegram Desktop open.
- Prevent the computer from sleeping.
- Use a stable Wi-Fi or Ethernet connection.
- Export in smaller date ranges if the full export fails.
- Start with one month or one module to confirm the settings.
- Do not select the entire Telegram account if you only need this group.
- Leave the computer connected to power.
06 · Keep the lessons in order
Telegram’s export may save generic names such as video_001.mp4. For reliable ordering:
- Open the exported
messages.html. - Find the first lesson title.
- Match its video filename.
- Rename videos as
001 - Introduction.mp4,002 - Arrays.mp4, and so on.
Do not rename files until the export is completely finished, because the HTML/JSON metadata may still refer to the original filenames.
If “Export chat history” is missing
| Problem | Fix |
|---|---|
| Using Telegram mobile | Use Telegram Desktop |
| Using Mac App Store version | Install the desktop build from Telegram’s official site |
| Videos are larger than the selected limit | Increase the maximum media size |
| Only recent videos appear | Change the date range to all time |
| Export stops halfway | Export module-by-module |
| Videos cannot be saved or forwarded | The group may have content protection enabled |
| Not enough disk space | Use an external SSD |
Best setup
Use Telegram Desktop, export only Videos, choose the full date range, set the largest media limit, and save to a drive with at least 500 GB–1 TB free
!