1–3: Network and Server Issues
**1. Test your actual bandwidth.** Run a speed test while the video buffers. If your download speed is below 5 Mbps for 1080p content, the network is the bottleneck — no client-side fix will help. **2. Check the video server's region.** If your video is hosted in a US data center and you're in Southeast Asia, you're seeing the speed of light as a literal limitation. A CDN with edge nodes closer to you eliminates this. **3. Try a wired connection.** WiFi adds latency to every packet. A wired Ethernet connection is almost always faster and more stable for video streaming than WiFi at the same location.
4–5: Video Encoding Issues
**4. Check the video bitrate.** A 1080p video encoded at 20 Mbps will buffer even on a fast connection if the server can't deliver it fast enough. Well-encoded 1080p should be in the 3–8 Mbps range. **5. Use the correct format.** MP4 H.264 is the most hardware-accelerated format across all devices. Uncommon codecs force software decoding, which stresses the CPU and causes stutter — especially on mobile.
6–7: Player and Browser Issues
**6. Close other tabs and applications.** Browsers share memory. If you have 40 tabs open, available memory for the video buffer is reduced, causing the player to pause to decode accumulated chunks. **7. Clear your browser cache and disable extensions.** Privacy extensions and ad blockers occasionally interfere with video segment requests. A quick test in a private browsing window with extensions disabled will confirm if this is the cause. If the video plays smoothly in private mode, the culprit is an extension.