--- title: Why are videos blocked in Academy? description: Your website might block videos on the Leadinfo Academy due to --- [Skip to content](https://help.leadinfo.com/en/why-are-videos-blocked-in-academy#main-content) English Show submenu for translations [![Leadinfo\_logo\_RGB\_Witte\_tekst-3.png\]](https://help.leadinfo.com/hs-fs/hubfs/Leadinfo_logo_RGB_Witte_tekst-3.png?width=135&height=28&name=Leadinfo_logo_RGB_Witte_tekst-3.png)](https://help.leadinfo.com/?hsLang=en) Open main navigation Close main navigation - English Show submenu for translations Hi 👋 How can we help? - There are no suggestions because the search field is empty. 1. [Help Centre](https://help.leadinfo.com/en?hsLang=en) 2. [Troubleshooting](https://help.leadinfo.com/en/troubleshooting?hsLang=en) 3. [General](https://help.leadinfo.com/en/troubleshooting?hsLang=en#general) # Why are videos blocked in Academy? ## Your device might block the Leadinfo Academy videos because of a strong Content Security Policy or CORS-Policy If you click play on a video in the Leadinfo Academy, but the video does not start, this is most likely due to a restricted environment.   Company networks or security systems sometimes block connections to external streaming services. When this occurs, videos may fail to load even though the course itself launches correctly.   If the videos are being blocked, please ensure that the following domains are whitelisted: • [cloudflare.com](http://cloudflare.com) - cdn • [cloudfront.net](http://cloudfront.net) - cdn • \*.[rendley.com](http://rendley.com) - media processing and playback functions - required for handling and displaying video content • \*.[rendleysdk.com](http://rendleysdk.com) -media processing and playback functions - required for handling and displaying video content --- #### Why does this happen? We use Easygenerator for our Academy courses, and when a course creator adds a video to an Easygenerator course, that video isn’t stored directly inside the course file. Instead, it’s delivered through Easygenerator’s secure Content Delivery Network (CDN). The CDN is a global system of servers designed to stream videos quickly, reliably, and securely to learners around the world. If a firewall, proxy, or network policy prevents access to the Easygenerator CDN, the video cannot be delivered, even though the rest of the course loads normally. Allowing access to Easygenerator’s CDN typically resolves the issue and lets the videos stream as intended. This setup ensures: - reliable global performance, - optimized streaming quality, - secure content delivery, - and dynamic course updates without requiring republishing. --- #### Why whitelisting is currently required The CDN domain must be accessible so that the video assets can be streamed. This is standard behavior for cloud-hosted learning platforms and applies regardless of the platform hosting the course. 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