I'm trying to comment on a specific frame in a video on Dropbox. In the help pages, I'm told this is possible in the following way:
How to comment on a specific time in a video
You can comment on a specific time in a video preview on dropbox.com. To comment on a specific time in a video:
Open a link to a video file, or open a video file on dropbox.com.
Navigate to the time in the video where you want to leave a comment.
In the comments pane, check the box next to the time stamp.
Type your comment into the textbox.
Note: Commenting on a specific time in a video isn’t available to all users or on mobile devices. It is available on dropbox.com for all supported video file types.
However, there is no 'box next to the time stamp' in the comments pane. The help file says "isn't available to all users" but is no more specific - how can I access this functionality? I am working on a MacOS Sierra, using Safari and Chrome browsers.
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