Does AEM 6.1 Assets provide following functionality? If not do we know which Adobe product provides this capability?
VIDEO: Does Adobe DAM generate any measurable metrics for video content (view count, play rate, engagement, etc.?
VIDEO: Will basic data like duration, file size, etc. be automatically generated?
For first part of the question:
Use Video heartbeat from the Adobe Analytics:- https://marketing.adobe.com/resources/help/es_ES/sc/appmeasurement/hbvideo/
// Video heartbeat is a new data collection service provided by Adobe that collects and aggregates video metrics.
To measure you need to integrate with adobe analytics. https://docs.adobe.com/docs/en/aem/6-2/administer/integration/marketing-cloud/sitecatalyst.html
File size will be populated. For duration it will show up in video component.