Users can now comment on a video or audio file saved in OneDrive for Business or SharePoint Online. It’s a cohesive commenting experience similar to those in Word, Excel, and PowerPoint. Users will see a Comments button in the upper right corner of the file.
Selecting this button expands a panel where users can have threaded conversations through comments, and file owners have full edit permissions.
Note: The backend used for this feature is the same as the existing backend for comments found in the details pane of some files saved in OneDrive for Business and SharePoint Online: