We have made scripts available on our Integrations interface that enable you to measure the audience of YouTube videos you have embedded on your site.
All the documentation is available here: https://management.atinternet-solutions.com/#/integrations
Once this is implemented you can run AV Insights analyses on this content as you would other video content.
Here is the full AV Insights documentation listing all the elements that can be measured: https://developers.atinternet-solutions.com/piano-analytics/data-collection/how-to-send-events/av-insights