Deadlifts and Kettlebell Swings are both FANTASTIC compound exercises.
However, in my experience I've found these exercises are frequently done incorrectly (with low back pain and/or intervertebral disc issues as a result).
There’s a natural tendency to pull with your back rather than generating the force from your hips. Both the hip-hinge and maintenance of a neutral low back can be tough to teach / learn (understandably so).
Without paying for a trainer (which can be costly) - what's the best way to teach someone to deadlift correctly (and "self-verify" they're being done correctly)?