Sure, an audit is necessary. But honestly, …. how many pages do you read of an audit report? Sometimes 1 image says more than 1000 words. Are trees planted as promised? Is the state of a bicycle path improved? How many were people were present at a clean up action? An audit video can give a good impression of the impact of an action. And it can be the introduction to the full paper report.
Here you see how an audit video could look like.