Global CDN Video Delivery
How Course37 delivers videos worldwide with adaptive quality, DRM protection, and buffer-free playback
Global CDN Video Delivery
Every video on Course37 — whether uploaded or recorded from a live class — is delivered via a Global Content Delivery Network (CDN) for fast, buffer-free playback worldwide.
How It Works
When you upload a video or a live class recording is saved:
1. Upload/Record → 2. Transcode to Multiple Qualities → 3. Replicate to CDN Edge Servers
→ 4. Student Requests Video → 5. Served from Nearest Server → 6. Adaptive Quality Streaming
Step 1 — Transcoding
The original video is automatically converted to multiple quality levels:
| Quality | Resolution | Bitrate | Best For |
|---|---|---|---|
| 360p | 640×360 | 0.5 Mbps | Very slow connections (2G/3G) |
| 480p | 854×480 | 1 Mbps | Mobile data connections |
| 720p | 1280×720 | 2.5 Mbps | Standard wifi/4G |
| 1080p | 1920×1080 | 5 Mbps | Fast connections, large screens |
Step 2 — CDN Replication
Transcoded files are distributed to edge servers around the world, ensuring content is available close to every student.
Step 3 — Adaptive Streaming
When a student plays a video:
- The player detects their internet speed
- Starts with the best quality their connection supports
- Automatically switches quality mid-stream if speed changes
- Result: smooth, buffer-free playback on any connection
Benefits
| Benefit | Description |
|---|---|
| Buffer-Free Playback | Even on slow 3G connections, videos play smoothly |
| Global Coverage | Edge servers on every continent |
| Secure Streaming | DRM protection — no downloads or screen capture |
| No Extra Cost | CDN delivery is included in your plan |
| Watch Analytics | Track time, completion rates, and engagement per video |
| Resume Playback | Students continue from where they left off |
| Speed Control | 0.5x, 1x, 1.25x, 1.5x, 2x playback speeds |
Supported Upload Formats
| Format | Extension | Supported |
|---|---|---|
| MP4 (H.264) | .mp4 | ✅ Recommended |
| WebM (VP9) | .webm | ✅ |
| QuickTime | .mov | ✅ |
| Matroska | .mkv | ✅ |
File Size Limits
| Plan | Max File Size |
|---|---|
| Free | 500 MB |
| Professional | 5 GB |
| Enterprise | 10 GB |
Security & DRM
Course37 protects your video content with multiple layers:
- DRM Encryption — Videos are encrypted during delivery
- No Download — No download button; videos can only be streamed
- Screen Capture Protection — Anti-screen-capture technology
- Token-Based Access — Each video stream requires a valid authentication token
- Expiring URLs — Video URLs expire after a short period, preventing sharing
Related Articles
- How to Add Videos — Upload video content
- Live Streaming Overview — Live class streaming features
- How to Add a Live Class — Schedule live sessions
- How to Set Up Timezone & Cloud Region — Primary storage region
CDNvideostreamingglobaladaptivebuffer-freeDRM