There is no longer a check box to make an object public.
You now have to:
In the list of buckets, click on the bucket that contains the object you want to make public, and navigate to the object if it’s in a subdirectory.
Click the drop-down menu associated with the object that you want to make public.
The drop-down menu appears as three vertical dots to the far right of the object’s row.
Select Edit permissions from the drop-down menu.
In the overlay that appears, click the + Add item button.
Add a permission for allUsers.
Select User for the Entity.
Enter allUsers for the Name.
Select Reader for the Access.
Indeed! Thanks for posting this! I presume they (Google) were getting flack for having it be too easy for someone to shoot themselves in the foot. I will have to update the lecture.
Correct. You can find the details on this here https://cloud.google.com/storage/docs/access-control/making-data-public