Within Teamwork Projects, you can preview uploaded/attached video files directly in your site.

For supported video files, you will see a play button to the right of the file.

Supported video files

The video player supports video files with the following extensions:

  • mp4
  • webm
  • ogv
  • mov
However, with these supported file types you may receive an error from the video player saying the format is not supported.


If this occurs, it is likely the codec used to encode the video that is unsupported.

The basic fix is to ensure your video is correctly encoded in H.264 which is the most commonly used and supported HTML5 video format.

Codecs & containers

The reason certain video types are unsupported is the encoding codec used in the file would not be supported by our HTML5 video player.

Video files consist of a file container and a codec within that encodes the video content.

Supported HTML5 video containers & codecs are:

  • MP4 container, H.264 codec
  • WebM container, VP8/VP9 codecs
  • MOV container, H.264 codec
  • OGV container, Theora codec
Unsupported video files

If you upload/attach a video file from the following formats, it will be marked as a video, but you will see a This video format is not supported message if you hover over the play button.


Unsupported formats:
  • avc
  • asf
  • avi
  • mpg
  • mpeg
  • flv
  • divx
  • wmv
You can find further information on Codecs & Containers here.

For more information, see: Uploading files in the Files area