While using the Widget Blueprint I found that when moving the anchor point it would display percentages from the borders of the screen. Which is fine but if you zoom out it will not properly move the personages from being covered by the icon.
Thank you for submitting a bug report, however, at this time we believe that the issue you are describing is not actually a bug with the Unreal Engine, When you move the anchor it keeps the widget the same relative offset, if they scaled up, they’d block everything. I believe the tutorial you are viewing may be using something on their end to modify those settings, possibly using a 3rd party plugin. You may want to reach out to them for further information.
I am having the same issue. This is pretty frustrating as as you said it makes it impossible to do anything without being extremely zoomed in. I am following the same tutorial and am about to ask there.