What’s wrong with my bathtub spout? Leaks out back with shower is(02)

What’s wrong with my bathtub spout? Leaks out back with shower is(02)

Video Screenshot Gallery: Shower Spout Leaking

Shower Leaking From Bottom Spout at Ruth Stone blog
Plumber Shares Simple Tip To Fix Leaking Shower Spout on Your Own
What’s wrong with my bathtub spout? Leaks out back with shower is