Yes, you can choose to refresh the social metrics in a book once a day, for article shares and YouTube likes/views. Make sure you're in the 'edit' mode and hover over the social shares tile below the front cover. You will see a green 'refresh' button, click and the social shares will update.
Just click on the Metrics & Backlinks menu from the Book Overview tab and refresh data.
It can take a little time for us to reach out and collect new data.. You'll see a spinning circle whilst we're processing it.
Videos on social shares and YouTube data
Here's a short video on social shares for online articles
And this is another short video on refreshing YouTube data. This comes direct from YouTube's API and can be refreshed manually from the report metrics summary once a day