Useful videos for different exercises for your lower back and hips.
Exercises for Better Posture - GCN
7-Way Hips Routine ProlificAthletes
Hip Strength Circuit VeloPress
Best Spine Stretches Routine
Pre Run Routine with Emma Coburn - FeetFleet
Core Strength - Dunne
Self Massage and Maintenance of Lower Leg Injuries - Innerunner
The Awesomiser - Innerunner
Yoga for Tired Legs - Adriene