Hello @sandeep kolisetty
Thanks for reaching out!
Retrieving viewer details or getting user comments on Stream video is not yet available using graph API. However, getting the stats of a drive Item is supported. Refer this documentation.
Since the feature/functionality you are looking is presently not available, you can submit a feature request idea using this support link, which will be monitored by Microsoft team and make the enhancements to Microsoft Graph APIs. I will also upvote for you.
Hope this helps.
If the answer is helpful, please click Accept Answer and kindly upvote. If you have any further questions about this answer, please click Comment.