Redmine Youtube Macro Plugin
To embed a video you have to extract the video key from the YouTube URL and provide it as input to the macro. For example the URL,
is the YouTube link to Gary Jules version of Mad World. The video key for this URL is 4N3N1MlvVc4. Use this key in they youtube macro as follows,
You can also size the video if you have a specific space to fill using,
The result is a nice YouTube video in your text content.
You can see an example here.