8 Bit or 16 Bit

Elizabeth Halford wrote an article with some great resources concerning the 8/16 bit difference. Here is what got through to me, this article I thought did a great job explaining the 8/16 bit difference and ways around it quite well.  But I still have questions.....

Here is a video explaining what happens when you do edit as a 16 bit image, and what you can do to get around it.