Fix video playback issues

In this article: Step-by-step fixes for the most common video problems in your Ruzuku course, including buffering, black screens, missing audio, and videos that refuse to load.

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Course videos should play right in your browser with no extra software. If a video is not working, one of the fixes below will almost always solve it. Start with the first section and work your way down.

Video is buffering or loading slowly

Buffering usually means your internet connection is struggling to keep up. Try these steps in order:

1. Pause the video for 10-15 seconds, then press play again. This gives the video time to load ahead.
2. Close other tabs and apps that might be using your internet connection. Streaming music, video calls, and large downloads all compete for bandwidth.
3. Move closer to your Wi-Fi router if you are on a wireless connection. Walls and distance weaken the signal.
4. Switch networks. If you are on Wi-Fi, try your phone's mobile data (or the other way around). This helps you figure out whether your network is the problem.
5. Lower the video quality if the player has a quality or resolution setting (look for a gear icon on the video player). A lower resolution uses less bandwidth.

If buffering happens on every video across multiple devices, your internet speed may be too slow for streaming. Try again when your connection is less busy, or connect to a faster network.

Video shows a black screen

A black screen usually means the video did not load properly or something is blocking it.

1. Refresh the page. This is the most common fix. Press F5 (Windows) or Cmd+R (Mac), or click the refresh button in your browser.
2. Disable browser extensions temporarily. Ad blockers and privacy extensions sometimes block video players. Turn them off for your course site and reload the page.
3. Try a different browser. If you are using Firefox, try Chrome. If you are using Safari, try Chrome. Chrome handles most video formats reliably.
4. Clear your browser cache. Press Ctrl+Shift+Delete (Windows) or Cmd+Shift+Delete (Mac) to open the cache clearing menu. Select "Cached images and files" and clear them. Then reload the page.
5. Check for browser updates. An outdated browser can cause display problems. Update to the latest version and try again.

Video has no audio

If the video plays but you cannot hear anything:

1. Check your device volume. Make sure it is turned up and not muted. On a laptop, check that you have not accidentally muted the speaker.
2. Check the video player volume. Look for a speaker icon on the video player itself. Click it to make sure it is not muted, and drag the volume slider up.
3. Check your output device. If you have headphones, a Bluetooth speaker, or an external monitor connected, your audio might be going to the wrong place. On Windows, click the speaker icon in your taskbar. On Mac, click the speaker icon in the menu bar. Make sure the correct output is selected.
4. Close other apps that might be using your audio, like a music player or another video call.
5. Try headphones. Plug in wired headphones to test. If you hear audio through headphones but not through your speakers, the issue is with your speaker settings, not the video.

If one specific video has no audio but other videos in the course play sound normally, the video file itself may not have an audio track. Contact your instructor to let them know.

Video will not load at all

If the video area is blank, shows an error, or nothing appears where the video should be:

1. Refresh the page. Press F5 (Windows) or Cmd+R (Mac).
2. Check your internet connection. Try loading another website to make sure you are online.
3. Disable your ad blocker. Some ad blockers prevent embedded video players from loading. Add your course site to your ad blocker's allowlist, then reload the page.
4. Try a different browser. Chrome, Safari, Firefox, and Edge all work with Ruzuku. If one is not working, another often will.
5. Try a different device. If the video will not load on your computer, try your phone or tablet (or the other way around). This helps narrow down whether the issue is with your device or the video itself.

Video plays but looks blurry

Blurry video is usually caused by a slow connection. The video player automatically reduces the quality to keep the video playing smoothly.

1. Wait a few seconds. The player often starts at low quality and sharpens as it loads more data.
2. Check for a quality setting. If the video player has a gear icon, click it and select a higher resolution (like 720p or 1080p).
3. Close other tabs and apps using your internet connection.
4. Try a wired connection instead of Wi-Fi, if possible. Ethernet is faster and more stable.

If none of these fixes work

If you have tried the steps above and the video still is not working:

1. Note what you see on screen — is there an error message, a black box, a spinning circle, or nothing at all?
2. Take a screenshot. On Mac, press Cmd+Shift+4. On Windows, press Windows+Shift+S.
3. Email support@ruzuku.com and include:
   • What the problem looks like (attach the screenshot)
   • Your browser and device (for example, "Chrome on a Windows laptop" or "Safari on iPhone")
   • The name of the course and the lesson where the video is not working
   • What you have already tried

The support team typically responds within a few hours on weekdays (Monday through Friday, 10 AM to 6 PM Eastern).

Frequently Asked Questions