CDS Videos

How to upload a video?

Click on the "upload" link close to your account name (you might have to log in) on the top bar. Then, click on the "New Upload" button. Upload your video file either selecting it or by URL. In the screen that appears, you can check the upload progress of the video and the extraction of other files and formats (other video formats, thumbnail pictures, etc.) and you can also enter metadata about the video.

A "Project" is automatically created: the Project will allow you to group several (master) videos together, if needed, and to group other files associated to the video (e.g. pdf or slides of the presentation, etc.). You will have to select the Category and Type of video, which will set the access rights and visibility. The category OPEN can be used by any user at CERN.

Note that the video is not be available publicly yet: the upload stays as a private draft until you decide to publish it using the Publish button.

How to publish a video?

Note that even when the upload is finished, the video will not be accessible publicly, as it is still a draft. In order to publish the video(s) you will have to fill in some mandatory metadata in the Basic Info tab, marked with a red asterisk.

You can start filling the information/metadata while the video is processed by the system, after it is fully uploaded.

When all the metadata of the video and of the project (only the category and type is mandatory) is filled in correctly and saved, the corresponding "Publish" buttons will be active. You'll be able to publish a single video or the entire project (all the videos contained will be published at once). The publish operation will make the video available for public view.

How to delete a video or a project?

Videos can be deleted only if not published. To delete a video that has never been published, use the button with the trash bin icon on the left of the Save/Publish button. To delete a published video, please contact technical support.

How can I restrict a video?

You can restrict the access to the video by editing it and scrolling down to the "Record restriction" section: you can change the dropdown to Public or Restricted and define who can access to the restricted video by listing the e-mails and the CERN e-groups.

Please insert the list of e-mails and e-groups, one after the other, with "" at the end.

How can I share my project with some colleagues?

If you want to share the draft(s) video(s) with some colleagues, before publishing, to collaborate at the same time, edit the videos' project and use the "Project editors" tab: input the list of e-mail and e-groups (with "") in the "Grant access to the project" field as restricting access to a video.

How can I upload subtitles for my video?

Subtitles in CDS Videos must be .vtt format files associated to the video file. Open the Files tab of the video frame (if you just started the upload of the video, you might need to wait for it to take place, depending on the size). Then follow the instructions in the Subtitle frame.

How to access high resolution CERN copyrighted material?

Click on the link of the high resolution version of the file ("Master video"). The conditions of use are then displayed. You can agree or disagree to the conditions of use by clicking on the "Agree" or "Disagree" button. If you accept the conditions, the download will start. Note that if a file is restricted and you are not logged in, you will be redirected to the CERN central login page. Follow the instructions on-screen to login (or request lost password, etc.).

Who can download high resolution multimedia files?

Anybody (journalists, physicists, individuals, etc.) who agrees to the conditions of use. Note that for some usages (personal use for computer wallpaper, inclusion in slides, etc.) you might want to download a lower resolution of the file, which remains a good quality enough. The lower resolutions files remains under CERN copyright, and the same conditions of use apply.

What are the conditions of use?

The conditions of use can be found at There you can also find contact information to request more detailed information.

When I try to download, I get this message "Redirect Loop"

Your web browser is most probably configured to use a web proxy to connect to HTTP servers, but not for connecting to (secure) HTTPS servers. To simplify, this makes you appear as two different users on our side, when you try to login, which we strictly forbid for security reasons on the CERN Document Server.

To solve this problem, you might want to either enable your browser proxy for both HTTP (port 80) and HTTPS (port 443), or to disable it for both protocols.

When I try to download, I get a blank page

You are probably using a browser extension preventing the download to start. For example we have noticed in the past that extension "AdBlock" was preventing users from downloading files

To solve this problem, please temporarily disable any extension blocking the download.

Internet Explorer tells me that the website is encountering problems.

Size of files that can be downloaded by Internet Explorer is limited according to the IE version. Please update IE or use another browser to download large files.

How can I get a better resolution of a document?

The documents on the CERN Document Server are generally already the highest quality available.

What about low resolution multimedia files?

Low-res files are also protected by the CERN copyright, and subject to the same conditions of use as high resolutions files. Though you will not need to login to access them, you agree to the same conditions (including the CERN computing rules) by downloading this material.

How do I select or change the cover/thumbnail of my video?

To select a cover for your video, go to the video's edit page and click on the 'Files' tab. In this section, you will find an option to view and change the Thumbnails. Simply upload a new image named 'poster.png' or 'poster.jpg' to set it as your video’s cover. To update the cover, follow the same process: go to the 'Files' tab on the video's edit page and upload a new image with the exact name ('poster.png' or 'poster.jpg'). This will automatically update and replace your current cover with the new one.

Are there special options for embedding a video?

Yes, there are several parameters that can be added to the embedding link in order to control the appearance of the embedded video. Below you can find the complete list:


this parameter triggers the auto playing of the video when the page is loaded. Please note that some web browsers turn off the sound for auto-playing videos.


this parameter hides the seeking bar, tool bar and title of the video.


this parameter turns off the sound of the video.


this parameter starts playing the video at the 5th second.


this parameter stops playing the video at the 30th second.


this parameter turns off the subtitles of the video (if they are available).


this parameter activates the subtitles automatically. [lang] should be the short code for the available language, e.g. en.


this parameter plays the video in a loop.


this parameter indicates that the video should fill the container and should be responsive.

Here is an the example of embedding a video that is muted and that will play in a loop:

<iframe scrolling="no" src="" width="560" height="315" frameborder="0" allowfullscreen></iframe>

Remember to add the "?" character before the parameter list and to separate the parameters with "&".