---
title: Why are videos buffering or not playing properly on Ten Ten?
description: Troubleshooting guide for video buffering issues on Ten Ten, including whitelisting Vimeo domains and network checks.
---
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# Why are videos buffering or not playing properly on Ten Ten?
### **Overview**
If videos are loading slowly, buffering, or becoming unwatchable, this is usually due to **school network settings or bandwidth restrictions**, rather than an issue with the Ten Ten platform itself.
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### **Why does buffering happen?**
From what you’ve described, this is most commonly related to:
- **Network filtering or firewall restrictions**
- **Insufficient bandwidth** on the school network
- Blocked access to video hosting services
All Ten Ten videos (including Life to the Full and CPD content) are hosted via **Vimeo**, so smooth playback depends on your network allowing these connections.
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### **What is the most important thing to check?**
The key step is to ensure that the correct domains are **whitelisted** on your school network.
We recommend asking your IT team to allow full access to the following:
- \*.vimeo.com
- \*.vimeocdn.com
- \*.akamaized.net
- \*.appspot.com
- \*.googleapis.com
- \*.google-analytics.com
- \*.hopx.cedexis.com
If any of these are restricted, it can result in:
- Videos starting but not playing smoothly
- Constant buffering
- Playback stopping altogether
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### **Where can I find technical guidance?**
You can find this information and further support on our Technical Support page:
[https://www.tentenresources.co.uk/technical-support/#videos](https://www.tentenresources.co.uk/technical-support/#videos)
---
### **Are there other things to check?**
If whitelisting is already in place, you may also wish to check:
- Internet speed and bandwidth during lesson times
- Whether multiple devices are streaming simultaneously
- Browser compatibility or updates
---
### **Summary**
- Buffering is usually caused by **network restrictions or bandwidth**
- Ten Ten videos are hosted via **Vimeo**
- Ensuring the correct domains are **whitelisted** is essential
- This typically resolves playback issues quickly
---
### **Need further support?**
If the issue continues after checking with your IT team, please get in touch with us and we’ll be happy to investigate further with you.
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