I would go ahead and watch the current course based on the 2020 objectives. A good bit of that content is still relevant. Much of the updates has to do with products being renamed, or options being moved within the Azure portal, or moved to a new portal. So while how you perform a task, or where you perform a task might change, the overall concept is still the same.
So unless you have something else to study for, watch the 2020 objectives version until the updated version is posted.
Hope this helps!
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